I have this TalkLock app and overall it isn't that bad... i am running the .87 version of the os and the app works like its supposed to, including unlocking. there is a slight bit of lag but nothing major. one thing i was curious about was that i read that you could change the image that is on the screen while talklock is "enabled" but after much searching(consider shaking down a bedroom and relate that to my virtual search of my phone) i have been able to find no setting menu for the app... anybody have any clues?
Now for changing the background...
I found a file, opened it in MS Paint, saved it as "TalkLock-Background.png", saved it to desktop. I tethered my BB to my laptop. I opened up "F:\home\user" and pasted the .png file there...pull the battery, count to 30, put it back in, call voicemail.