Lupin3rd, you are probably incorrect. We went around on this awhile back, because at the time, I did not possess an "Upgrade" version of X tra P utrid.
However, after obtaining one (upgrade) I discovered, and others on here seem to agree, that the upgrade CD's seem to be all bootable.
This is NOT true of Wihnehoed98 or earlier, in which case neither the Upgrade, nor the "store bought" RETAIL editions will boot.
At least some NT and W2K CD's boot, I can't speak for the Upgrade versions--don't have any.
You can confirm this by downloading something like the trial version of ISO Buster, and use that software to "take apart" the boot sector of the CD. If it is bootable, you'll see the boot sector on there.
Additionally, it is possible to install X tra P utrid from a DOS launched environment, so if for some reason the XP cd won't boot, then maybe you have an '98 CD that will boot. You should be able to use it to partition/format the hdd (in FAT) and then launch an XP install from the CD, either from the CD, or by copying the /I386 directory to the hdd.
I CANNOT IMAGINE haveing a laptop without a floppy. I have both an old Acentia, and have and do have several Thinkpads and EVERY ONE OF THEM has a floppy drive available.