I'm still here. The good news is that while out Christmas shopping I picked up (for myself!) a floor-demo V5 at CC for only $150!! So now I have a second machine to play around with. I will now be able to test out Programmer's modified JB6, and try to get a later kernel working in it. I will be putting a hard drive in this one, and hope to be able to switch back and forth between booting the hard drive and the sandisk/JB6.
Of course, this doesn't answer your question. That's because I don't know right now. I have a feeling it isn't a black-box specific item, but rather a basic X issue. I seem to recall running across a line in some script setting the screen to blank after X minutes.
Your might try to search all files for the word blank or screen; something like:
for i in `ls -aR` do
cat $i | grep blank
cat $i | grep screen
This probably won't work, since I don't recall off the top of my head what the option is for ls for doing recursive listings, and you may turn your console into giberrish when you cat a binary. But you don't know if you don't go.
I don't think you can shrink the cursor. That is probably hardcoded into balckbox or X, but you never know. If anything, it might be a font.