I'd suggest you to reinstall pvk beta 2.31. Get it from
http://www.pvkii.com if you don't have it for some reason. It comes with grogbot 1.0 preinstalled. Then, to use 1.1 on pvk 2.31, modify the "gamedll" section of your liblist.gam, which should be located in the pvk directory, to this:
Code:
gamedll addons/metamod/dlls/metamod.dll
Then follow the metamod version installation instructions in the readme.txt.
And PMB, the latest metamod officially supports pvk already (1.17.2 and up)