WindowsXP + Slipstream problems

Recently I thought it would be a smart and useful idea to create an unattend script to have a fully-automated install of Windows XP...however, to do this successfully I'd require a CD with XP and SP1 already slipstreamed...
I've tried numerous times to create this Slipstreamed CD, but it never worked... Let me explain
I've followed the detailed instructions on a MSFN site of how to directly slipstream the Sp1 package onto a WinXP CD...
The problem comes to when I am trying to use my Slipped CD and setup windows...
It will recognize the CD and begin the install process, however, upon initializing the devices (such as Scsi and such) and begin to load setup, it will just hang and nothing will happen.
The screen stays at "Setup is starting windows" and never leaves this screen...
I've tried several things to get past this;
pressing f6/f7 during setup to install the HAL
disabling the acmpi (?) in the bios
flashing the bios to latest version
unplugging equipment
However, none seem to work..
It's strange because the Orignal XP CD Works fine without me having to adjust things, however the CD with Sp1 slipped wont...
Suggestions, Ideas, Comments are very welcome

Thanks

Jeremy

 

This guide is very similar to the one I used, In fact, the same
And I tried this also, I still get stuck at the "Windows is starting setup" screen..