Windows XP MCE 2005

I'm trying to install Windows XP. The only disc I have for it is a Home SP2 disc and the key I have is for MCE 2005.

During the installation, it doesn't check the key on the internet, right? So, does anyone have a key I can use, even if I can't activate it? I just need a key that will work for the installation.

Oh god, just fucking go to any business with an XP computer and write down the product key from the Certificate of Authenticity sticker that's usually in plain view.