[mahnsawce]

A littlle more explaining hint:

MetamodX was a modified version of Metamod 1.17, since that version was last released in, I think it was, October or November of 2003. Since then there were a few changes and additions for some mods which required an update of metamod for it to work properly. The AMXX developers responded by releasing an unofficial version which added in support for the new and changed mods.

However, in late May, Metamod officially released 1.17.1, thus nulling the need for the unofficial version, MetamodX.

In short: The newest official version of Metamod will work for you, no need for MetamodX.