Hi All, I have read several tutorials to come-up with creating an OEM dvd and my goal is to create a Windows Vista Ultimate OEM DVD (Recovery DVD) for HP Pavillion AXXXX (e.g. HP Pavillion A6550D) or SXXXX (e.g. HP Pavillion S3481D) Series because these are only bundled with Windows Vista Basic. Below are the steps that I know how to do it. I'm gonna need your help with this though. Preparing the ISO Create a new ISO file using UltraISO. Add all files and folders from the original OEM DVD bundle (Recovery DVD) Remove the $OEM$ folder copied from the original disc. Download the right OEM Download Windows Vista Ultimate OEM for HP. Question is... where can I get the contents of the Ultimate OEM for HP that works on these series? Can someone help me get the right one. Extract the contents and add the files and folders to the ISO being created, specifically inside the SOURCES folder from which the original OEM folder was removed when preparing the ISO. Buring the ISO Copy the BOOT information from the original OEM disc. Burn the ISO to a dvd. If my understanding on these steps are incorrect or if the steps are wrong at all, please direct me to the right path. By the way, the reason why I want to create such dvd is because I am planning to buy one HP desktop from these series and reformat the pc and reinstall an Ultimate edition. If there are things missing, please add and explain. If understand it correctly, I don't need to modify the BIOS since these desktops are already bundled with OEM information inside it (am I right with this assumption?) Your help are very much appreciated. Many thanks and more power!