FSX AI

I'm trying to add some custom AI to an airport. I have 2 problems.The first is that I would like to add some helicopter AI traffic to my airport however I can't find any models that are suitable for FSX. I found some that work in FS2004 but they were made for FS2002 so I don't think they would work?Secondly I have WOAI flightplans for FedEX that have plans for 727s in the early hours of the morning (2AM-6AM). This is accurate however I would like to have some FedEX 727's sitting on the ramp during the daytime because that would be even more accurate. As of right now these aircraft don't appear until the middle of the night. How could I have these AI aircraft sitting on the ramp during the day?Thanks for anyone who can help!