Install Visual Studio 2015 MSVC x86_32 redist if its not installed already(even if you have x86_64 installed you will still need to install x86_32): https://www.microsoft.com/en-in/download/details.aspx?id=48145
Create ~/Mu(in Windows this is C:\Users\USERNAME\Mu)
Put palmos41-en-m515.rom in ~/Mu
Boot the emu to the homescreen(may require touchscreen calibration)
Install apps with the package button(dont install a second until the first has finished and the emu is responding again)
Copy userdata-en-m515.ram to you RetroArch save directory and load the emulator in RetroArch on your device of choice