CoDJumper.com

I place my CoD map in my CoD4 map_source and it wont let me run it.

Anyone know why?

because cod4 won't run cod1 maps. If you open the .map in cod1 radiant, change all textural brushes to caulk, and copy them (keep in mind no models) to cod4 radiant it will work. You should be able to keep texture, origin, clip, etc. brushes.