These are 24 additional spawn coordinates for de_rush suggested by d00ds.com, so you can add them easily to your 64 player server.

CT:
1072	-4160	84
1072	-4224	84
1072	-4228	84
1072	-4352	84
1072	-4416	84
1072	-4480	84
800	-4352	84
800	-4288	84
800	-4224	84
800	-4160	84
904	-4112	84
960	-4112	84

T:
1024	-952	96
960	-952	96
896	-952	96
832	-952	104
768	-952	104
1152	-768	96
1088	-768	96
1024	-768	96
960	-720	96
896	-720	96
832	-720	96
768	-720	96