Hi,
I like the look oh the topics module from version 6.5 but I have no idea how to edit the module to work with 6.0 ... I uploaded the 6.5 module to my site but i get this error

Fatal error: Call to a member function on a non-object in /vol/home2/sites/site22/web/modules/Topics3/index.php on line 26

Im not even sure what line is number 26 LOL

I would suggest that you simply upgrade.

I do not think you can use the 6.5 module with the 6.0 system. The database system was completely changed, so it would be fairly difficult to modify it accordingly.