I own both a macbook pro and an iMac. My iMac is rarely used, so I figured I would dl the snow leopard retail disc to hackintosh my mini10v.
I've seen a few people post here with many problems similar to the ones I had: grey screen, spinning wheel, unable to complete install, etc.
All these problems disappeared when I purchased the retail disc at the Apple store. My first install completed without issue.
If you have downloaded OS X and can't get it to work, take it from me and save yourself loads of time and energy and go buy the disc. It's only $29 anyway.