I downloaded the some amp sims and vsts and placed themin my vstplugins directory which I added to the list of folders via the options menu.

When I try to insert an fx or virtual instrument the freeamp doesn't show up in the list. In fact, no vst's I've downloaded will show up, just the core ones that came with Reaper. What am I doing wrong here? thanks guys im new to reaper!
Freeamp is so awesome..

Anyways, go to the folder named REAPER (which would be in Program files)---->Plugins----->FX---->Paste your plugin there

That's what I do, and it works

Hope it works for you too!