Not all Dell laptops can run XP. You didn't tell what make and model so we can't double check for you.
What OS came with that laptop?
And the killer item is this one -> "I have an OEM genuine winxp disk that came with my desktop computer."
Microsoft enforces the license so it won't install on another piece of hardware. OEM license lock to the OEM hardware...
I tried to install winxp pro on a Dell laptop and I get as far as the embios. bin file and it won't move from there. I have gone ahead and skipped the file but then windows won't recognize the license. I have an OEM genuine winxp disk that came with my desktop computer. Can anyone help, thanks,Lino