I should mention one last thing in terms of total portability
One of the members here asked if he could copy everything across to a USB stick so that he could take this around to his friend's house and just play. Yup, definitely possible!!!
So depending on whether you decide to use the registry or .INI file; here are the instructions:
Registry:
... Copy the directory "C:\WinUAE" --> the USB stick.
... Copy the "WinUAE.reg" file --> the USB stick.
... Go to your friend's house, plug in the USB stick, double-click the "WinUAE.reg" file and play.
.INI file:
... Copy the directory "C:\WinUAE" (with the .INI file included) --> the USB stick.
... Go to your friend's house, plug in the USB stick and play.