Originally Posted by
Unspoken Knight
No guide yet sorry, but it isn't too hard to set up. Just create a new folder on your pc, add it to be synced with Live Mesh and then share it with your friends Live ID. Once they accept, install the hotseat launcher on both pc's, run the HS launcher, ensure the M2TW install path is correct and set the transfer path to the synced folder on each pc.
If the paths are correct, You should be able to start a new game with the HS launcher and then your friend can join it.
Windows Live Mesh is fairly easy to set up, but I have since tried using Dropbox. Dropbox seems a bit easier to use, doesn't have a user limit and doesn't require Live ID accounts. The instructions for using the HS launcher over Dropbox are pretty much the same as above.