It's a long time ago that I've been so happy with a free VST as with Acon's Effect Chainer 1.0 :
http://www.acondigital.com/us_effect..._download.html
My parents once gave me MusicLab's DrumTools Performance Designer for my birthday, which was SO sweet... I reported various times here that it makes REAPER crash heavily, and it did so till I downloaded this new effect chainer today...
It simply solved the problem. Amazing!
And now it wouldn't even amaze me if ALL non-working vst(i)'s would start functioning in REAPER when loaded in Acon's Chainer... Do give it a try!
http://www.kvraudio.com/news/5940.html