You can download both the original (pre-SP1) language packs as well as the new, not yet officially released, SP1 language packs from the link in my post further up in this thread. The new language packs were apparently released to MSDN subscribers and leaked. As far as integrating an SP1 language pack into a new SP1 disk, I have no yet tried that. However, what Magic writes is correct, I'm sitting on that installation right now. Makes a bit of sense too; if you have Vista and a language pack installed, and install SP1 from Windows Update or whatever, you are essentially doing the same thing -- updating to SP1 but only having a pre-SP1 language pack. That's why I think these new language packs are a bit mysterious, and strange that Microsoft really doesn't mention them. The Windows Vista Blog has some blurb about it, but the person who wrote that post writes so poorly it's hard to decipher what he's really talking about; the Service Pack or the Language Pack or both.