I'm playing with WinInstall LE right now hacking the MSI file. I added the new msxml4.dll file to it successfully. I'm trying to remove the SDK from the MSI to save some space, though, and while it shows as removed, the file size of the MSI doesn't change at all. Just for kicks, I tried removing all the files from the MSI file and it still shows the same size after saving (5.04MB). I'm half beginning to think I might as well just create a new MSI from scratch with all the right files. Meh, we'll see