Is it possible to use any of this on the forums, or do you have to have your own separate website? I just want to pull ratings from this ladder and display them next to somebody's name.

For example like this:

////////////////////////Rating //WinStreak///// Games Played

1. RiversPlate 1800 /// 1 /// 30
2. Misery___ 1850 /// 0 /// 24
3. hellrazor__ 2000 /// 0 /// 26
4. Eaglefast22 1700 /// 0 /// 30
5. [7th]AwakeNg 1850 /// 0 /// 25
6. PediarS 1750 /// 0 /// 20

Is there any way to do it?

It's not possible to do that at the forums. Sorry. :/