Slipstreaming XP SP3

Step 1 - Install nLite

Step 2 - Copy the XP source files from an XP CD

Step 3 - Fire up nLite

Step 4 - Select the source files

Step 5 - Well, there is no step 5

Step 6 - Select the nLite options

Step 7 - Select the service pack source files

Step 7 - All the heavy lifting is handled for you

Step 7 - Done

Step 8 - Creating the ISO file

Step 8 - It only takes a few seconds ...

Step 8 - Done!

And that's all there is to it!