Aardvark Q10 and Pro Audio 9 plug-in install??

Well I crashed a computer and now I have loaded this combo on another WIN XP computer and this time running an external hard drive (WD) for the files via firewire... I am only recording audio... I have gotten some downloaded plug-ins saved ...  Where would I save these files and how would I get the Pro Audio 9 to recognize them??... I cant remember but I think there was a "wizard"