I just did a search on blackberry forensics. I have been told before," where there is a will, there is a way". I have no idea if it is possible to get past the bb password lock or not, but why not store the account info in the vault or purchase an encrytion program to keep your data safe. You have awaken a thought that I had when I first started to put account numbers into my bb, I don't know if what I posted helps but I normaly do overkill so I feel better with the encrytion progam and locking the bb.
edit/ I don't know if they do "file" encrytion though.