This is applicable for Windows Mobile 5.0 and earlier. Windows Mobile version 6 already has the functionality built into the platform
Before you can install applications on Windows Mobile Devices; you would be required to copy or install pre-requisites. These files are usually CAB and REG files as given below
- sqlce.ppc.wce5.armv4i.CAB
- sqlce.repl.ppc.wce5.armv4i.CAB
- NETCFv35.wm.armv4i.cab
- NETCFv35.Messages.[language].cab
Download and Install below softwares onto your PC and then copy the required CAB files as suggested by the Application requisities onto the Mobile Device
You may also seek assistance from below Microsoft Post