To make DM and COOP(missions) work all 2gether - is very difficult ie missions replaces sum objects, what gives u an advantage on DM maps, bcoz u can c players through objects n they cannt c u.
Solution: 2 different SharedTex folders. 1 for missions, 1 for dm.
Keep in mind that, mapmakers didnt work as the losv game creators, who actually had their actions synchronized. Thats y theres a variety of folders with same objects under different names, wot actualy corrupts the game ie 1 mapmakers mess replaces another ones n u get 1 mission instead of the other 1. So its time to choose as sum maps n missions r real troublemakers.
I recommend to install trusted ones, like reini, rossie, imm, andyc, kingdonut, darkman. Still its gonna replace sum files, but it can b fixed easier.
In the end, after ull have the most of missions n dm maps workin on ur machine, nobody will b able 2 join ur server as ur game is now different.
1 more last thing, when im thinkin of how much time, energy n other resources the job - 2 make all those maps work 2gether is gonna take - its not worth it.