Downgrade Vista to XP

My laptop came with XP Pro installed. I bought XP Home Premium and installed it as well as Office 2007. I am a little frustrated to say the least in regards to the speed and poor preformance of Vista and for productivity reasons would like to go back to XP but don’t want to have to install 2390 programs and transfer all my files back to my system if I have to format and re-install xp. Is there any other way to get XP back on my machine without having to start from scratch? Is it as easy as popping in my restore discs? ::crosses fingers::