Originally Posted by d_fisher
You can not remove the splash screen as you already guessed. As far as the themes go, the vendor.xml file contains information used during the install to identify the BlackBerry model and carrier. If you delete the vendor.xml file you will see all the vendor specific themes instead of just Verizon.
In a nutshell... JavaLoader did delete everything. The Verizon theme was simply reinstalled when you reloaded the OS because the vendor.xml file identified your BlackBerry as a Verizon device.
Here is a thought, is there some way to change the device ID? I realize that none has been discovered yet but, I would imagine that there must be a way.