[asheshouse]

I use date stamping in file names a lot to keep track of different versions.
You just have to change the file reference in the load.ini to use the correct version.

Examples:

actors_master03-02.static ---- this is the complete actors file created 3rd February.
actors_small.static ---- actors with buildings removed
map_h27-01.tga ---- map_h created 27th Jan

You can use any naming system that suits you.