This is probably so easy to do but not for me. I was able to rename the xp entry with no problem but not the vista entry. I changed both the entries in the ad/remove and saved it. Then restarted. But it booted right into xp. So i put the vista dvd in and restored the bootloader, restarted and got the selection screen. But it showed the new xp name but now showed the vista name as vista recovered. I tried this over and over again with the same result.