From: rcwepp on

We have a machine that was originally licensed with Windows Vista Business
OEM, but has currently XP Professional installed, using the downgrade

The XP Professional is in english language but the user now want's to have
it in spanish language.

So, we were planning to do a clean install with an XP Professional Spanish
media and re-use the original license key.

Would this work or would we need to buy a new license ?