Currently working on an official piece of hardware called the "Multirom". It comes with a piece of external hardware and a driver ROM. You stick the driver ROM in the front slot of the computer. You then can put 4 of any ROM applications into the multirom. You a press a button on the device to select which ROM you want to use, then when you hit C on the keyboard the multirom runs and executes the ROM you selected. If you change your mind, you can select one of the other 4 ROMs by clicking on the device.
In a nutshell, it lets you plugin 4 ROMs and toggle between which to run, so you don't have to keep duping ROMs in.