This is what I do to convert Q3 maps for EF: I recompile the map with different pickup items, because Elite Force uses different weapons, powerups, ammo pickups. To do that I will have to recreate the .map file (bsp2map), change the entities in the .map file and recompile it (via parameter "-onlyents"). If possible I change the Q3 environment sounds to EF sounds. I have to compile a new AAS for the bots also. I also will have to change the arena file so it contains Elite Force bots and gametypes. Minor texture or shader leaks I have to fix with standard Elite Force textures or shaders or I have to write a new shader under the Q3 shader name using EF textures to recreate a similar shader (EF has a big single player portion with lots of textures so that's usually pretty easy).
Here the list of converted maps and maps that could be converted but have not been so far because I couldn't get any permission from the author (invalid E-Mail oder no response). If you find your map listed here pls send me a message with a permission to convert your map(s).
Maps that could be converted (permission needed):
79drgc2
aetime
ame7q3ctf1
aqua
charon3dm11v2
charon3dm13
cmp1-dm5
cmp1-dm6
confirmed
deadmeat
drggc3
ev_tpmc
gnc_monochrome
hal_palindrome
ik3dm2
ikzdm1
is5
jaxdm10_jaxtourney3
jaxtourney2
kamq3dm2
keenq3dm1
kellblack
ktsdm4
lun3dm3
lun3dm4
mapsparth
mc-tm01
meatpak_two
minima
mvdm11
mw3tourney2
mythology
necro4
nkstrdm4
oildm1
padcrash
platypus
plutonians
q3-aetime
q32thecore5
q3arc1
quimera
sonne_q3
spkdm1
stchdm1
towersofhope
ts_pm2
twq3tourney2
unitooldm6
uzul3
waxxgeo1
Permissons:
Industrial
q3_ultrav
q3_curse2
Converted maps:
"Almost Done - Rage" (dade_rage):

http://eliteforce2.filefront.com/file/;97566
"Marilyn" (rota3dm3):

http://eliteforce2.filefront.com/file/;97527
"Map for Rota" (emc2dm1):

http://eliteforce2.filefront.com/file/;94863
"Rush To The Disco" (acid3dm8):

http://eliteforce2.filefront.com/file/;94204
"Mystic Gemini" (mg_final):

http://eliteforce2.filefront.com/file/;94205
"Neon Light" (vpldm3):

http://eliteforce2.filefront.com/file/;91831
"JUL20" (jul20):

http://eliteforce2.filefront.com/file/;91865
"Sunset Isle" (casablanca):

http://eliteforce2.filefront.com/file/;91828
"East Berlin Roofs" (zih_roof):

http://eliteforce2.filefront.com/file/;91830
"Rushed" (acid3dm6):

http://eliteforce2.filefront.com/file/;89816
"Hypersonic Tourney" (zl3tourney1):

http://eliteforce2.filefront.com/file/;89907
"The Wisdom Machine" (quintdm3):

http://eliteforce2.filefront.com/file/;87101
"Ripper's Play Ground" (dk_olt):

http://eliteforce2.filefront.com/file/;84034
"Iris" (rota3ctf1):

http://eliteforce2.filefront.com/file/;83893
"Monolith" (monolith):

http://eliteforce2.filefront.com/file/;83696
"Let Me Go" (dmr3dm2):

http://eliteforce2.filefront.com/file/;83432
"La Bastille" (bastir):

http://eliteforce2.filefront.com/file/;83130
"KARIN" (rota3dm2):

http://eliteforce2.filefront.com/file/;82493
"Sommergewitter" + "Windernacht" (summer,winter):

http://eliteforce2.filefront.com/file/;81824
"Chiroptera DM" (chiropteradm):

http://eliteforce2.filefront.com/file/;81096
"Discontent" (kamq3dm2):

http://eliteforce2.filefront.com/file/;79967
"JUL18" (jul18):

http://eliteforce2.filefront.com/file/;78733
"Reise Rei/se" (mjdm2):

http://eliteforce2.filefront.com/file/;78631
"Bebels Kwab Kamp" (takkie3dm1):

http://eliteforce2.filefront.com/file/;78315
"Wish You Were Here" (mc-tm01-myth):

http://eliteforce2.filefront.com/file/;78129
"JUL16" (jul16):

http://eliteforce2.filefront.com/file/;76657
"redq3dm2_squared" (redq3dm2):

http://eliteforce2.filefront.com/file/;76402
"Love Thy Enemy" (sokar3dm6):

http://eliteforce2.filefront.com/file/;73433
"Pacemaker" (redq3dm1):

http://eliteforce2.filefront.com/file/;74841
"Vorsprung durch Vernichtung" (mkvdv):

http://eliteforce2.filefront.com/file/;74719
"lichtwärts" (cht2):

http://eliteforce2.filefront.com/file/;76195
"Ice Storm" (sokar3dm5):

http://eliteforce2.filefront.com/file/;75928
"unbalanced" (acid3dm5):

http://eliteforce2.filefront.com/file/;73378
"Kritische Masse" (cht3):

http://eliteforce2.filefront.com/file/;76156
"Earth Core Program" (Fjo3tourney1):

http://eliteforce2.filefront.com/file/;75929
"Everything Else Is Green" (Fjo3tourney2):

http://eliteforce2.filefront.com/file/;76076
"Inf_Speed2" (mc-sm02-inf):

http://eliteforce2.filefront.com/file/;76194
"Moonstone" (moonstone):

http://eliteforce2.filefront.com/file/;63714
"The Stolatene Mine" (af3hex):

http://eliteforce2.filefront.com/file/;63814
"Swiss Cheese Trickster" (qfraggel3ffa):

http://eliteforce2.filefront.com/file/;63704
"Butchered Creatures" (alkdm13):

http://eliteforce2.filefront.com/file/;63813
"Peacefull Holidays in Egypt" (bal3void1):

http://eliteforce2.filefront.com/file/;63713
"Malfunctioning Nano-Constructor" (bal3void2):

http://eliteforce2.filefront.com/file/;66298
"Aint no Time" (chitourney1):

http://eliteforce2.filefront.com/file/;65156
"Been smoking too long" (dade_x):

http://eliteforce2.filefront.com/file/;67365
"Algopole" (dk_gc):

http://eliteforce2.filefront.com/file/;67024
"Icon Basilica" (dk_ib):

http://eliteforce2.filefront.com/file/;65297
"fascinating senseless" (pukka3dm2):

http://eliteforce2.filefront.com/file/;64343
"Suboptimal" (pukka3tourney5_EF):

http://eliteforce2.filefront.com/file/;64688
"Kill You" (q3dade12):

http://eliteforce2.filefront.com/file/;66537
"Respawnfrag" (q3macho6):

http://eliteforce2.filefront.com/file/;63764
"QBeast" (qbeast):

http://eliteforce2.filefront.com/file/;64024
"Concrete Void Redux" (rjlctf2b):

http://eliteforce2.filefront.com/file/;63718
"Subway" (ut_subway):

http://eliteforce2.filefront.com/file/;64834
"Geometrica" (wvwq3dm4):

http://eliteforce2.filefront.com/file/;63715
"Hands Of God" (handsofgod):

http://eliteforce2.filefront.com/file/;64709
"Ostentatiously Organometallic" (lae3dm3):

http://eliteforce2.filefront.com/file/;65094
"Neorganic Epiphany" (dubneoc):

http://eliteforce2.filefront.com/file/;64506
"Ascension" (gaeldm1):

http://eliteforce2.filefront.com/file/;63578
"Projectile Vomiting" (gc4dm1_nomusic):

http://eliteforce2.filefront.com/file/;63708
"Amanda" (geo3_fusion):

http://eliteforce2.filefront.com/file/;66592
"Geo Core" (geo-core):

http://eliteforce2.filefront.com/file/;64627
"Disinformation" (bal3dm3):

http://eliteforce2.filefront.com/file/;64862
"Estatica" (estatica):

http://eliteforce2.filefront.com/file/;63763
"Leaks2" (leaks2):

http://eliteforce2.filefront.com/file/;66470
"Post" (post):

http://eliteforce2.filefront.com/file/;64979
"Poekster" (pohan3dm1):

http://eliteforce2.filefront.com/file/;65581
"Animoe" (pohan3dm2):

http://eliteforce2.filefront.com/file/;65764