An app for PDA devices has been created by Developer yozgatg which can let the device boot into dual mode. This application will basically allow the user to choose what OS will be booting (either WM or Android). The application is made for VGA and WVGA devices only.

Android on WM devices is getting more and more popular, especially with the latest developments, and it’s almost ready for daily use. Gen.Y DualBOOT is an app that  could easily boot into both WM & Android, and supports both booting from Internal Storage (moviNAND, e.g. Touch Diamond) & Storage Card (SDMemory, e.g. Touch Pro). This app has been tested on WM6.1, but will work perfectly on WM6.5.x as well.
Keep in mind that your android setup must be installed already at the root of your storage card in order for this app to work correctly (e.g. \Internal Storage\haret.exe or \Storage Card\haret.exe respectively)

Download from forums xda-developers