Yeah, unfortunately I can't do that. I don't have the option since I am on a Mac.
Is the link I posted to the Windows SP 3 ISO the exact same thing as the slipstreamed file creates? I believe it is... That's what I am hoping at leasthttp://www.microsoft.com/en-us/download/details.aspx?id=25129
"Windows XP Service Pack 3 (SP3) includes all previously released updates for the operating system. This update also includes a small number of new functionalities, which do not significantly change customers’ experience with the operating system.
This file is a CD image file for users who wish to create an update CD for Windows XP Service Pack 3, for example for offline installation by administrators. "