Hey there
there are only 3 ways of testing if and how some features of cod2 menu mods may work:
- check cod2 ui and ui_mp sources for references. if no success, check cod1/uo, cod4, cod5, cod7 ui/ui_mp sources
- the only quake menu modding site ive seen so far: rfactory.org (here you go) (Note: not all features will work in cod2! but its pretty good explained how quake menus do work)
- test and fail on your own until eternal despair (this is the true way of cod2 menu modding, no way arond :/)