Collapsable Right-Side Column [How to get rid of it!?]

[SolarTalk]

I don't want visitors having the option of collapsing the column on the right side of the forums.

1) Could I completely turn it off and manually put in code to add a permanent column on the right side of the forums? If so, how would I go about doing this. Another reason why I'd like to go this route is so I can make the column a little more narrow than the default.

2) Is there a way to just get ride of the button visitors click to collapse it?

Thanks in advance.