Convert .NET CF 3.5 app to PocketPC 3

We have an application, which is running on .NET CF 3.5 SP1, programmed in VB.NET 2008. We have also devices running it fine (Psion Ikon, WM6.1), and we also want to utilize old Intermecs 700C. So we want to convert that application either to .NET CF 1, or some native code running on that Intermecs. The operating system there is PocketPC 3. The converted application should be made in some Visual Studio, preferably in VB. The application is standard form-based application, with utilization of barcode scanner, GPS and GPRS. I don't know if Intermec 700C supports all of them, but GPS usage is optional, and GPRS can be replaced with serial port or USB usage.