I also need to install Xp Pro on a Del Vostro 3750. In fact, on two 3750 for work...I am not a pro like most of you out there, so i will need to be spoon fed.. Thank You All...
I assume you want to keep Windows 7 and install Win XP as a dual boot system, and if you have to be "spoon fed", suggest you
1- Search for dual booting
2- Get someone who knows how to do it for you.