For those of you that do not want to DeOdex their phone manually, here's a script I created to do it for you. I've created this same script before for the Droid X, and it's quite simple. Here's what you need.
1) Your phone must be Rooted.
2) You must install Bionic_Bootstrapper.
Below you can find these items.
COMPLETE GUIDE TO ROOT AND BOOTSTRAP
Once you have that.... download my DeOdexer and put it on your sdcard.
Reboot into recovery. BACKUP YOUR PHONE!!!!
Once that completes, then go to install from zip. Choose file from zip... find the Bionic_DeOdexer zip file... and run it.
There is a script at the beginning that checks the build.prop file and makes sure you have the correct build. You must have 5.5.1_84_DBN-55. If you do not, I hope it fails.
Reboot.... and all should be good. Now that you are DeOdexed.... have fun theming!
As you should know, do this at your own risk. Yes, I've tested this on my phone and had no issue. This doesn't mean you won't experience a problem. I'm not responsible for what happens to your phone.