NAVMAN PDA 570 GPS thingy. How to connect to the internet?

brought this thing from Comet. New job, travelling 20,000 miles plus. Need GPS and mini computer with internet capability. Bloke said try this!

I am an AOL Broadband member, tried setting up account on PDA and it was a complete nightmare.

Do I need extra bits to my PDA? Do I need a brain transplaint? Can anyone help?
I also use MSN on my ISP AOL to contact people and thought that wou;d be useful.

Please help, my brain is meltiiiing....melllltiinnnng!