I've tried searching for adding buttons and combining apps but have not found anything useful.

I've not paid enough attention to this thread but perhaps the iTablet is what I need.

And I did not want to start a new thread.

I want to be able to mash a button and have the following happen:
the gps fire off
acquire sats
beep when GPS is locked on
fire of Maemo mapper
center on my point
start tracking
fire off bluetooth connection
connect to my headset
start playing tunes from my "walking" directory.

Then when I'm done with my walk, I mash the same button and turn it all off and save the tracking info in a file with the date/time.

I've other apps that I would like to combine also.

Is this doable?
How difficult?
I can do basic scripting and some PERL.

Thanks in advance