Take a look at the compressor size. That'll give you a good idea what you can do with it. Ideally you'd have 1/4 HP, but thats probably much larger then your fridge would have. Also you'd probably need to add a larger condenser onto it. Most minifridges i've seen have tiny condensors or even none at all since they just run for a few minutes on the hour and thus don't really need to be able to transfer lots of heat.
Edit: Specs here:
http://www.lge.com/products/componen...tification.jsp