Noobquestion - how to change to left side?

[KrukaaN]

Hi! Right now in my showthread.php, posters username and memberinformation is on the top and then a hr-line and then the text of the post. Like this: http://www.moppeforum.net/trim-tips-...358/index.html

I want it like this. The posters usernamn and memberinformation is on the left side of the page and then comes the text of the post at the right side.

I hope that you understand my bad english and know how to fix my "problem"

Piece! / KrukaaN