It doesnt sound like a ram problem you need to find someone with a bootable windows CD
Usually they look like that. Then set your bios to boot from CD (often just setting the CD drive as teh first boot device will do)
and then boot xp from the CD see what this does and get back to us. Check with friends anyone with a windows PC may have one. Note that not all bootable CDs for XP look the same but most look like the above. Out of the 5 licences I have 4 look like the above.