Possible to develop an application on Altina device !!

Hi all,
I did some application on Vb.net 2005 for PC. And now, i try to write some thing for running on handheld devices. I'm new on Mobile development. I tried using simulator on .net for testing my tiny project. But i had just got an old navigation device from my friend (Altina 800). So I wish to develop an app can run on it, example an calculator. Then I have some trouble with this device, if you have any experience on this, please give me an advice:
1. I dont know if i can format this device and install WinCE only. Is it the same format and install operating system on a PC.
2. Navigation device (Altina 800) = Wince + navigator app of Altina ? If i can remove/uninstall every thing. Just install Wince, and using it for testing my application.
3. When i start this device, the default screen of this is displayed. so i can't do anything to call my application i put on it. So how should i do in this case.
Thank so much, hope get useful advice soon.