Ok, so I precisely followed the instructions on Slipstreaming the Windows SP3, even made the same exact files used in the tutorial. I got the extracting done...but an error code comes up once I do the Windows Share command: C:\XP-SP3\i386\Update\Update.exe -S:C:\XP. I get an error that says the following:

Setup

Failed to copy some or all of the files necessary for integrated install

Please check that:
a) No network or copy errors occurred during the integration process
The format of the destination directory is correctl
The files to be integrated must reside in an i386 and/or ia64 or nec98 directory
(i.e. for an i386 share, if you typed "update /s:c:\cdshare", the files must be in the c:\cdshare\i386 directory).