Click here for the thread at BGG which has the link for the module and an extended pictorial walkthrough of how to use it: http://www.boardgamegeek.com/thread/756340/vassal-mod-available
Note: I did request permission from FFG to share this, but did not receive a response. So I'm providing this with the understanding based on their previous response and restriction for the LackeyCCG version, that nothing be added that hasn't been released for at least 6 months. So currently, this module only includes the base game, Hunt for Gollum and Conflict at the Carrock. And I can't guarantee that I'll keep up with everything from here... the main purpose for me to have this module is because I travel a lot and I like to be able to play some of my favorite games on my laptop on an airplane or in a motel room, etc. But with my travel schedule about to hit its busiest time of the year soon, I don't expect to be able to keep up with all of the APs and Khazad-dum, etc. I'll do what I can, but please don't expect everything to come out in any kind of timely manner.
And no doubt some will prefer to use Lackey to play, but if you're familiar with Vassal, you might find it easier to figure out and play around with. Lackey is great, but for whatever reasons, I do prefer using this module to play. Anyway, for what it's worth, it's available.