If it's anew pc preloaded with W7 then you have problems getting drivers for XP.
An easier solution, if you have the Professional or Ultimate version is to use the XP mode by installing XP in W7.
If you only have the Home Premium you can upgrade to the Professional version to be able to use XP mode, which will allow you to run programs that are not compatible with W7.
Go to Microsoft for more info> http://www.microsoft.com/windows/virtual-pc/download.aspx
XP Mode features> http://windows.microsoft.com/en-AU/windows7/products/features/windows-xp-mode