Why do you want to creat your own forms?
If you have 100 favor combo drills, it's pretty hard to remember and number it from #1 to #100. If you create 3 or 4 forms to cover all your favor moves. It will be easier to "remember" for yourself. Of course you don't need to train your form. It just serve as a text book. You keep it. Open it when you need.
Here is what I have found the easiest way to do it.
1. Put all 100 combos on in .doc format on your computer.
2. Identify those combo that the last move can make you to turn 180 degree. Mart it as T.
3. group every 4 combos together with the T combo as the 4th combo (you can call this 1 road).
4. You can construct your forms by 4 roads (16 combos), 6 roads (24 combos), 8 roads (32 combos), ...
Any comments?