the only concern may be drivers. many of the dell disks were specific to the pc it came with. when used, it would set everything up and not require separate driver installs. it'll still install xp no problem but may not have drivers needed on a different system. so you will need to track down the needed drivers ahead of time so they are ready for install once xp is up and running.
i remember using these disks on systems that were not even dell brand. so they are standard xp install disks just with a custom driver installer matching the model it came with. think i still have one of those in a box somewhere as well.