Well there is a double edged sword here.
First you can download any version of XP Home and your serial will work. But it will give you a problem during activation. Since the hardware will be all new and not was was originally activated with that Serial you will have to call M$ themselves and get a code to get it activated.
I do not accept support questions via EMail, PM, IM or my G+ page!
Phone: LG Optimus G Pro
Running: Stock JB from LG with Nova Launcher