I am not exactly sure what help you are looking for but here are my thoughts. Start by getting an external hard drive. Next on your XP computer, go here (
Download details: Windows Easy Transfer for Windows XP) and download the new file and settings transfer wizard and transfer what it saves to an external hard drive. This will grab just about everything that is important for you including your files.
Now, on your new PC, load all the applications you will want to run. With Win 7 there is a new feature called UAC. It is a security step that asks if you are really sure you want to do something. Yea, I know it can and will be a PITA, but it will help keep bad things from happening to your PC. I am an IT consultant and recommend that you don’t turn this off.
Now, on the Win 7 PC, go to start/all programs/accessories/system tools and finally Windows Easy transfer. This is essentially the program from above you ran on your XP PC. Use this program to import your XP files and settings.
Be ready for a learning curve with Win 7. Things are and will be different. But IMHO, it is the best OS Microsoft has done.
Enjoy.