There is a nice little tool that I found a while back that works really good for XP.
First, as long as you are doing this with a computer running XP there are no problems, but if you do it on a computer with anything newer than XP there are certain changes that need to be made.
Step 1 is to get all the updates for XP. There is a tool and instructions here
on how to do just that.
Step 2 is to get the XP SP3 file from here
Step 3 is to put it all together. There is a nice little program called nlite. The directions for using it are here
, the page numbers are up at the top. The program is available here
Read over the instructions of those two programs and let me know if you have any questions. These two tools make it possible to do the whole thing in a half dozen mouse clicks or so.