Melt 'n' Pour Soap?

[chaiya.livejournal.com]

I got a few soap supplies from a friend, and one of the things in the package was a lot of "olive oil melt and pour soap base bulk logs." Does anyone know how to use this stuff? Can I add fragrances and clay and stuff like that, or will it be ruined? I usually make soap from scratch, with oils and lye and stuff -- this is a new one on me! And I'm happy to play with it, but I want to play without ruining the trace or making it seize or stuff.

Help? Sorry for the all-text post.