I briefly tested out bidule and was able to make everything work by following a small tutorial I found online (not sure where that is now, sorry). If you're just using bidule as a VST host, there's not much too it; it just looks more complicated because of all the 'wiring', etc.
I believe the help file that comes with bidule will get you there.
Also, Michael Patti at Cinesample made this great little video showing his setup with bidule. You can learn a lot just by watching this -- and it will fill in the blanks.
Mahlon