Transparent borders with Adium

[Nappa]

I'm trying to completely redo my Adium.
I already managed to make the contact list transparent and only appear when needed. I found a good theme for message window and and made that transparent too.

Test screenshot:

Now my only problem is to get the message window borders gone and make the scrollbar disappear.
Can this be done inside Adium or does it require extra work/applications. If so, what kind?

Thank you.

 

[Nappa]

Also if someone knew a way not to hide but to modify them I would like to know it. None of the message themes I've tried so far have done anything about the borders.