I have checked the FAQs, tutorials and a bit of the forum but haven't found an answer I am comfortable with...at least comfortable enough to proceed with the upgrade.

I am working on a Vostro 220 that was ordered with Vista Business and an XP Professional downgrade installed.  So, the computer is currently running XP.  The owner would like to, finally, upgrade to Windows 7.

I have two disks from Dell.  The Dell Windows 7 Upgrade Assistand DVD 32-bit and the Windows 7 Upgrade Option Windows Vista Business to Windows 7 Professional.   Needless to say I am a bit confused.

Can I simply proceed with an XP to Windows 7 upgrade and assume this Vista to Windows 7 will perform the upgrade properly?  Do I need to somehow install Vista first (and if so, how do I do that with the materials at hand)?  Or is the owner simply out of luck when it comes to using this upgrade?

Thank you in advance for any information you may have.  I really appreciate it.