Try this site for good ai stuff (and other topics). I have just d/l yroute from Spacejock, and it makes doing your own flight plans EASY. It May look complicated at first, but sit and look at it. You will find it a doddle. It works in conjunction with t/tools.
Go to..http://www.tony.smiths.btinternet.co.uk/fsgate1.html then click AI Stuff (or other) click yroute and d/l. Also Project AI on site as well as others.
Hope you find something of help.
Regards, Tony C (Bucks, UK)