You have an older XP installation CD and you would like to integrate Service Pack 2 with that ...
You would also like to add your latest and greatest hardware drivers on the disc if possible ...
And you would like all that to be present on a bootable CD, for when disaster strikes.
Well, then following articles are a must read. The process to create such a disc is called "Slipstreaming Windows XP with Service Pack 2". In the spirit of don't invent the wheel a second time I'm not going to clone my own article from following information. I rather have you scan through them and then pick the one you feel most comfortable with to help you guide through the process.