suite of Internet essentials of my MAC ! Please Help

I am new to Mac... I bought the Mac with the Suite of Internet Essentials as well. I registered with .Mac and everything worked well with the registration code. After using the Mac.Book for 5 days it fell and the HDD broke. I lost all my documents . I had to pay 126 pounds for a new one. After getting it back I wanted to register again but it didnt work with that registration code, the reason was because it has been used once, and it doesnt remember my ID
1- Is there any way I can back-up my files ?
2- How do I register again or get my ID back .

Please HELP !

Mac-B