dont worry, if people are still having problems i found a way of installing.
just find Adium 2.0 in Library>Application Support>Adium 2.0
and then just drag into the folders of which the files go to.
thankyou.

I have Adium 1.1.1, i have tried to install by clicking install and nothing happens, i then download the files and double click on them and cant open up with adium that way? i also tried to drag and drop files in xtras manager.. help please.