What are the best procedures for migrating from a T43 Windows XP, to T520 Windows 7?

Are you referring to migrating data?

Yes, data, the directories and folders, etc. I have 500GB Western Digital external drive so I am hoping that will be helpful, but what are the steps for migrating from one machine to another?

Windows Easy Transfer is one way ...
http://windows.microsoft.com/en-US/wind ... y-transfer

Why don't you just copy all the files you need off your T43 onto an external hard drive and then copy them onto the T520? That's the easiest way.

There is a program From Microsoft, called Windows Easy Transfer. Supposidly you can transfer from one machine to another machine via, a transfer cable, network(either wire or wirelss) or by external hard disk or USB memory key/flash drive. Has anyone tried this method yet? Are there anythings that I need to watch out for with this procedure?

I have the same suggest.

"I have the same suggest."

If you mean, "I have the same question"
Yes, the Windows Easy Transfer Cable works and is very easy to use. Just make sure you have all the programs you want to use installed on your new computer or new hard drive -- then with Windows easy transfer, all your personal settings/data/info will be transferred over to your new Windows install.

The WET cable is a waste of money. Simply share a folder on your new machine. On the old machine, map a drive to the shared folder. Run WET, choose to save it to an external drive, then point it at the mapped drive. Choose a file name, and go. Once it's done, just double-click the file on the new machine to start the import.

I always thought that windows and easy were mutually exclusive terms.

I'll bet it doesn't transfer applications either.