Quick question about the home screens

Greetings everyone.

I just got my case for my Atrix in the mail today and its a sweet case too.  But since I have small hands the case adds a little bit of bulk to the case and I can't reach the dialer option with my thumb I keep hitting the account button.  My Atrix came with the Gingerbread update installed btw.  So I'm wondering is there a way to switch the way those 4 main buttons around?  Thanks a lot. 

A week with the Atrix and its been great.  I love this phone so much more than my Karma.  My niece is even a little jealous and she has an iphone.