The supplied .ent files enable the maps to be played using CTF entities. They can be used in a number of ways:-
1) use qbsp3.exe to apply them as follows (This is generally for use with Zoids Quake2 CTF)

qbsp3 -onlyents c:\quake2\baseq2\maps\q2e2m*.ent

If the bsp is in the same directory as the ent file then the entities will be changed accordingly

2) For use with L-Fire CTF put the .ent files in the ent directory in the L-Fire CTF directory

Im sorry I cannot be more specific but I do not play CTF and have only recently been informed of this ability
Read the documentation supplied with the CTF mod on how to use the .ent files accordingly.

-Serberus
UIN: 160537
E-Mail: Serberus@clarionuk.co.uk
Http://www.clarionuk.co.uk/serberus/quake