I use the command texcompres and maxtexsize to remove the lag (texreduce suck)
in maps as
abbey, kopen (forget the name),suburb and a few others maps
I use the command maxtexsize 64 and texcompres 45 (they removed the lag well)
but there is a small lag in abbey (only in an area of the map) attempt to further reduce the number of the commands to the half 32-20 and ohh surprise (:V)