Progress is unstoppable so I did an upgrade to OS5 handheld. After first enthusiasm came disillusionment as well. The main problem was lack of hacks in PalmOS5... (the other was e.g. new graffiti 2 but this is another story)

I started studying all thing about hacks in PalmOS5 and found useful application and source of important information: YAHM (hack manager for PalmOS5), which has a lot of documents describing why are hacks no longer supported and how it should be done on PalmOS5...

I started trying how it works and how to do it using OnBoardC - and I found that it could be solved based on all information I got. So I wrote PowerButton application which you can download here.