Searc button is your friend.
1) Make a directory into trem/base/ called mapcfg
2) Edit your server.cfg and add/change line seta g_mapConfigs "mapcfg"
3) Make a plain text file into trem/base/mapcfg/ called default.cfg
4) Add this to default.cfg
set g_humanBuildPoints 300 // Number of buildpoints for human team, default 100
set g_humanMaxStage 2 // Maximum human stage (s1=0, s2=1, s3=2)
set g_humanStage2Threshold 1 // threshold for humans to reach stage 2, default 20
set g_humanStage3Threshold 2 // threshold for humans to reach stage 3, default 40
set g_alienBuildPoints 300 // Number of buildpoints for alien team, default 100
set g_alienMaxStage 2 // Maximum alien stage (s1=0, s2=1, s3=2)
set g_alienStage2Threshold 1 // threshold for aliens to reach stage 2, default 20
set g_alienStage3Threshold 2 // threshold for aliens to reach stage 3, default 40
GL & HF
G.