Use the installer and use the same WaW-profile, and it should work

When i use both installers, one overwrites the other. That happen because both installers use the same folder. If i put the files in a different folder each mod has it level and experience. I already try to put all files together (not overwriting files with the same name)  on the same folder and use the map command (map map_name) to load the other map. That command load the map but no zombies appears.

Somebody knows how to make both realism mod maps (Nuketown and Estate) work together with the same level and exp?