Oh FR/LG eh? Well I haven't done anything with either of those games tbh but I have an idea. First find your Method H-2 spread that you plan on getting. Then get in the game and find out what the current PRNG value is, then search in the RNG reporter main window for Method H-2 spreads entering the spread you want with max results being 99999999 (that's the max it can handle). If your spread doesn't come up then reset and load the game again until you get a starting point that's within the first 99999999 frames of your spread.
Method H looks really simple. You can use that PokeRNG tool that's for 3rd gen to search Method 2 spreads IIRC then you search for it as Method H-2 in RNG reporter (sync optional) and you would use sweet scenting to hit the frame. I have yet to try it out myself but I'm going to try a retail capture first.