[LocutusH]

I would try to talk to LDuke. I am sure, he can extend his script to work with css, or provide you with the required modifications.
He already did such a plugin for metamod, but thats also not working anymore. Perhaps you can ask him to give out the source code, and get some ideas how to do it.

BTW, i dont know if you should stay with this per player damage modifier. In my case, i just want a global multiplier, that sets damage compatible with the damage statistics. Nothing more. Maybe this is way more simple to do.