Woohoo!

I found a similar circuit that is based on the more common
N-Channel power MOSFET.
The circuit was a MOSFET based touch switch where you finger's
condictivity across two pins acts as the momentary switch.
The circuit was for a lamp, and didn't make allowance for 'staying on'.

After some modification I got the physical circuit working great
first go. The second circuit also doesn't use the second
transistor (Q2).

I have had LOTS of fun with it now that the pic can turn itself off.
If you get a PIN wrong, the pic can say bye, bye! ...
The same if the program has a point of finalistic determination,
where the pic can turn off after completing a task.

I will post my schematic in the right section since it might help others.
Cheers,
Art.