make a folder ISO on C: and copy your complete (nonbootable) CD to it.
get a cd bootsector from /http://home.online.no/~msols/xpboot.bin and drop it also in the c:\ISO folder
Get the Microsoft CD premastering utility CDIMAGE.EXE (send me a mail if you can't find it) and drop it also in the c:\ISO folder
Now from a command prompt execute the following statement (all on 1 line):
c:\ISO\CDIMAGE.EXE -Lmylabel -T04/15/2003,12:00:00 -Bc:\ISO\xpboot.bin -G -H -M -N -O -X c:\ISO c:\mybootcd.iso
-L = Replace mylabel with any cdlabel you want
-T = Set to any date you want (all files on the new CD, will be set to this date and time)
This will create myboot.iso in the root of C: (test it with vmware or virtual PC, capture ISO image) then burn it with your favorite app.
Enjoy
mb
edit: maybe needless to say, but you can use this same procedure to make your own bootable XP & 2K CD with slipstreamed SP