In all honesty, from my tests this is the same as PID.INF, its just setting the key for the install. I will explain a bit more below. Now we come to the same problem, if you use ANY key other than the "one" prebuilt into the installer straight from MS, it will fail. The setup already running and the rest fails to install. Any other keys short out the core install somehow by altering the IDs needed for the WHS componants to realise its actually WHS and not SBS. Tonight I am going to release a build 4 of the pack which will no longer include the PID.INF since it seems to be the consensus for me and others that other keys cause the install to FAIL. You can only change the key AFTER the install is over. I will also make it check the source DVD has a SRV_2003 folder since thats just a good idea anyhow. Offon7544, if you can find any reason why its failing for others, or even why it worked for you somehow, we would love to hear it. So far you are the only one to make it work with other keys during the install. I am still looking for vbs files to change the product key, but all the ones ment for XP that I have found spit out errors.