Hello,
As a guess, the Hewlett-Packard
iPAQ rx3715 Mobile Media Companion may use memory which is powered by a battery to store its configuration settings. When the power is fully discharged, the settings stored in memory are lost and have to be re-entered.
As a work-around, try charging the unit before it fully runs out of power.
Microsoft
ActiveSync is the software which allows you to synchronize data between your computer and your PDA. It can also be used to install software on your PDA. Usually, software for a PDA comes with specific instructions on how to install it, so you may wish to refer to those first.
Nyditot Software makes a program called Virtual Display which allows you to change the orientation and resolution of a PDA's display. I've used it in the past and it worked quite well.
Regards
Aryeh Goretsky