Add Author column

http://img291.imageshack.us/img291/426/postsfloridaqy0.jpg (http://imageshack.us)

I would like to add a seperate Author column and move the Last Post to the Last column.

Same for this one:

http://img171.imageshack.us/img171/2404/searchfloridano6.jpg (http://imageshack.us)

I would like to add a seperate Author column, move the Forum bit to the front and the last post bit to the end.

Could someone point me in the right direction?