I have seen "Lock" as a softkey, I forget where. There are registry edits you can do to change your softkeys, and configurators you can download, too. Lists of useful registry edits are everywhere, including Wikipedia. But I suggest you search the Touch Pro 2 Tweaks, Hacks, Tips and Modifications thread here:
http://forum.ppcgeeks.com/showthread.php?t=78019. That's as far as I'll take you. I know the information is in there. Happy searching!
