To Yen or anyone else of the modders: I have the HPQOEM SLIC installed on my motherboard via the ISA.BIN method. I also have the HP Ultimate key and OEM certificate. I did a little test today. I installed Vista Ultimate x86 and it activated perfectly. I then formatted the drive and installed Vista Ultimate x64, it does not activate with the HP certificate. What I have found out from other web sites is that the HP certificate floating around is only good for 32-bit activations. I want to install x64 using the HP SLIC, do you have the HP x64 certificate that you can post? The reason I want to use HP SLIC is that I also modded the bios with SLP 1.0 for XP using DMICFG and added "Hewlett-Packard." Right now the bios has both SLP 1.0 and SLP 2.0 using HP. Thanks, I appreciate your hard work.