Hi Joel,
Almost anything is possible!
The best starting place for learning how to safely customize things is our Themer’s Guide, so definitely review that first of all if you haven’t already done so.
Please also note that the amount of support we can offer when it comes to custom coding is generally pretty limited so I may not be able to offer too much further help on this one, but if you do have further, more specific questions definitely let me know and if I can point you in the right direction I’d be happy to do so.
(It might also help to get some more information on exactly what you are trying to achieve, as right now I’m not absolutely clear as to the final outcome you’re gunning for 🙂 )
Thanks!