The hash should change from Ultimate to Home Premium. Did you cross check with the hashes on the MSDN site?
I have a problem. Yesterday I wanted to do this but the cdimage can not run on my computer. Does it working on Vista only?
Thanks prxprx, But this doesn't work for me! I'm using pp_windows_7_ultimate_x86_dvd_x15-65947.iso original MSDN and want to make a pp_windows_7_home_premium_x86_dvd_x15-65758.iso. Did all the steps but any of the hash values matchs! Maybe its the date/time zone? I don´t know! Can anybody help me?
Then your ISO is buggered The tool does NOT care about language, as it only changes UDF properties (it knows nothing about language etc) sebus
I don't think that's exhaustively correct. I can verify that the tool "windows7_iso_image_edition_switcher" linked above does in fact not work with a known correct german Windows 7 Professional x86 ISO (SHA1 d57c8fee033e0aecdb8baaeb9213a4647eadedb4). (By looking at the patch files in a hex editor, I highly doubt that this tool works for anything else than english language ISOs. Maybe there is a different tool around than the one linked in this thread?) @pjrg: When setting the time zone before image creation, make sure that not only the GMT offset is correct, but also the state of daylight saving time. Since the Windows 7 ISOs were created in July, you must make sure that the time zone on your PC is not "Pacific Standard time", but "Pacific Daylight Saving time"! (You can do this by setting your system clock back to July 2009 or something similar ...)
MaJo24, thanks very much! That was the problem! Change the date back to July 16, 2009, change the time zone, and its done! Again thanks!