Running a HP 5550 and I needed about 3 weeks to get all the info required to update, update, update, adjust, reset, update....
Now it works charming. Whenever the Wifi starts own schedule of being available or not, remove the battery, wait 10 seconds, battery back...e voila...
Do not attempt to reset with the battery not in place...that is something like FDISK on W98....
I have 1 GB chip installed and the PDA does what I want, as said, after a lot of convincing arguments not to be published here....