Its Window XP *Itanium* Edition - Itanium is a 64-bit Very Long Instruction Word (VLIW) processor from Intel.
There is also a another version of XP which supports the Intel/AMD 64-bit extensions to x86.
its definately says titanium, its got a picture of the log in screen and its got a metal coloured background saying titanium, anyway, i'll have it in a few days so i'll give it a try.
Titanium is a hacked version of Windows XP SP2.
I strongly advice not to install it on anything else than a Virtual Machine as it has a lot of problems.
Btw,avoid another OS called Windows XP Uranium Edition as it sucks even more than Titanium.