Allowing my rooted Sanyo Zio to work with my Vista 64 computer
Unfortunately rooting your phone won't change a thing, as the problem is on the Windows side.  If Windows doesn't have a way to communicate with the phone (ie, a driver), then it doesn't matter if the phone has a different ROM on it - the hardware is still the same.

However, if you package your apps as APKs you can upload them to the SD card and then click on them to install that way.  In Eclipse: right click on the project > Android Tools > Export Signed Application Package.  Follow the prompts and you're flying.