From what I understand, the 360 Slim doesn't actually have any changes concerning the emulation aspects.
I know that the GT2002/JSRF double disk did not work on emulation, I had to buy JSRF standalone to play it (unless it did work, and there was some issue with 50/60hz voodoo or something...).
In any event, I wouldn't expect any changes, if it worked on 360 Fat it should work on 360 Slim and Vica Versa.