Hard drive data transfer kit question

I have a 20 gb and a 60 gb hard drive. The 60 is completely unused, and the 20 is on the brink of being full. My question is if I get the data transfer kit, can I transfer everything, including my xbox live gamertag? Help is appreciated.

If it helps, this is what I am thinking of getting:

http://store.microsoft.com/microsoft/Xbox-360-Hard-Drive-Data-Migration-Transfer-Kit/product/7707C68E

Is it worth it for $15 (+ shipping?) from microsoft or is there a reliable cheaper way to buy it?

Might take a bit longer, but it would be much cheaper to just use a flash drive xXRukasuXx

How can you do this? I have a 4gb flash drive, so that would not take that long in theory.

I figured it out and am in the long process of transfering everything with a 2gb memory stick, because I didn't want to open my 4gb just for this, and it was not even on the compatible list. Many thanks to those who helped and saved me a decent amount of money.

Amazon sells the transfer kit for under 10 dollars.goki1012