I think you misunderstood.
I am a repairs manager for a very large pc company and we have our own recovery cd's that we use. It requires our BIOS's to have the DMI string changed in order to work properly.
The recovery CD's we use we mastered by a sister company and they no longer use them. What I want to do is to slip sp1 and updates into the recovery CD so that we do not have to keep reinstalling updates every time we do a non-destructive recovery.
The reason we use the recovery CD's is that we cater for a very specific market, and we have several backup options available, one of which is the recovery CD, which cuts the install time of Windows XP down to around 8 minutes.
Looking at the i386 directory, it is much smaller than on the full OEM cd, so I wondered if there was a way in slipstreaming it at all