[rhelgeby]

To do that you'll need to modify ZR itself. You can't override stuff in ZR from other plugins.

The tricky part here is to allow zombies to use grenades without ZR blocking it. What you want to do conflicts with how ZR works. I actually don't know how to do that without modifying ZR itself, but again, then you'll need to do an unofficial special release of ZR with this feature.

ZR is using SDK Hooks to block zombies from picking up weapons. If several plugins try to hook this, I guess the most restrictive result (blocking) will be the final result, even if other plugins say it's allowed.