Can't you get your hands on an XP CD of the same type as yours? I have seen them available for download as ISO files. XP is almost at the point of being considered as Abandonware. Then you can do a repair reinstall from the CD using your key#. I have done this dozens of times for XP units that come over my bench. With a repair reinstall you do not lose any of your data or programs.
[EDIT]: on 2nd thought, I am not sure if this will work with an OEM, however. At least its worth a shot.
keeps asking for a floppy in A: drive (of which I have neither
Go into the BIOS as set CD=1st boot device, HDD as 2nd boot device. In these older machines, it is usually set to boot from the floppy disk first. Of course, those do not exist any more. If you have problems doing this, try disabling the floppy in the BIOS. Sometimes I have to play around with it before I can get the CD to boot first.
Edited by ranchhand_, 03 September 2016 - 07:24 AM.