Firstly, let me thank you with the same enthusiasm that "Jake" did, above. This is awesome... Next, me being a dummy of sorts, can you explain exactly what the term "sysprep" means to do, in the above quote? I have the Win 7 RC in a vhd, boots fine, etc. I do understand everything you've written thus far, but do not understand what the "sysprep" is, or -how to do it-. I've got various OS's as .vhd under MS Virtual PC 2007 SP1, and would like to put one or more under the Win 7 bootmgr, just for testing fun, but will have to "sysprep" their copies beforehand, I guess... Thanks again for your amazing post and thank you for any further assistance. Best regards, Chuck R.