best thing to do is find a number it gives the error, and a number it doesn't give the error and loads with no mods, and then go half way in between the numbers til you get the mods to work, that's what i did anyway (e.g. 2000 gives the error, 3000 does not. drop to 2500, if it gives an error go to 2750, if not go to 2250, and so on until you get the right number.)