Editing the Boxes Widget: Number of Columns

Thanks for the great template, I’m working on a portfolio site:

http://puzzledstudios.com/

and I am trying to add more columns on the Boxes widget if this is actually possible, I looked into the PHP code but I’m not sure where it is referencing to, other then threecol and fourcol.

Wasn’t sure how much more I could get away with.

Thanks!