So whenever I'm on a mod and hit play, the activison thing comes up and then it just crashes. The WaW crash console thingy comes up.

Mabey a screen shot, Mabey t4m mod is needed, details should help a little more because that is all I could think of.... most likely for others too. But, what do's the console say from the exiting? Missing code_post_gfx/common? Or similar. Pirate version? (I know it's old but people don't relly want to help if its pirated version).... plus that is rude to ask but these are basic questions. (Also people expect from ugx-mods).
Please is it all of your mod/custom map, I mean every thing off your mods-in game Do's this?.

Please can you provide a screenshot of the crash console?
And also, if it says something about exceeding the limit of sound, image, or fx assets then install T4M here:

https://www.mediafire.com/file/9p1zcena5seqfzp/T4M+r45+%5BRelease%5D.rar

Just drag the d3d9.dll file into your WAW root directory.