Is there any way I can change the language of a German copy of Win XP to English?

Is there any way I can change the language of a German copy of Win XP to English?

Hi,
Is there any way I can change the language of a German copy of Win XP to English, without having to reformat the HD & install an English copy of Windows?
I've seen a cheap PC, on a German Web site, and would like to know is it possible to change the O/S language. I'm not worried about the electrical side of things, as it's just a change of plug.

Thanks for any help