I was really frustrated about not having an 'ok' button easily accessible while using the touch one-handed.. ae button plus to the rescue..
I have the left dirctional key mapped to (single press) left, (long press) start menu..
...The right directional key mapped to (single press) right, (long press) ok
Works perfectly
There's a very slight lag when pressing left/right (for instance, while in the program menu), but really, how often do you use right/left? I almost always use up/down but don't use right/left that often...
-mark