I don't think the computer will be any more usable if you put it on an island with some kind of cheat or mod. The sims will still need to sit on a chair to use it, and the island will be too high for the animations to look proper.
If you do want to do it anyway, I suggest you use the OMSPs from here:
http://www.modthesims.info/download.php?t=317716 (You'll need AL for the shiftables to work, but some of the extras are basegame compatible)