Sorry to see no one has replied to your post yet. I don't have much advice to offer. I know FertilityFriend is pretty popular here. I would highly suggest NFP. Most use it to prevent pregnancy but it's really good for getting pregnant too. One myth is that you can't use it if you have irregular cycles but I believe that to be false. A speaker I heard once said it was wonderful for her planning her children b/c it taught her to get to know her body. She knew by being intune with her body, watching the CM, all the little signs her body gave her to indicate when she was ovulating and she said she was VERY irregular. She however did not do the temps though. I can't remember why now though lol

You could try a search on Yahoo for 'ttc and irregular cycles' I'm sure there are websites out there with more detailed advice.

Good luck!