The easiest way to connect to another computer is using Hamachi
The Host and people joining must have the same patch
Once you've downloaded hamachi and installed it, open it up and should look like this :
To create a network for other to join click the network tab
And when you click create a network, this box will pop up and just put in a unique name and password for your network.
Hosting for FM10:
Go to preferences:
then click on the Network tab and Type in a server name but most importantly TICK run as server.
Force continue is optional although I would advise it if more than 1 person is joining you game.
Once that's done just start a new game like normal using any patch you want (as long as the others players have it) and turn hamachi on. The players joining must copy your I.P address to join (will be explained further on).
Joining a game for FM10:
On hamachi instead of creating a network game you have to join an existing network. You have to ask the host what the name & password is.
On FM10 start screen, click Network and you should come to this screen. Then you click Join other server in the bottom right hand corner.
The I.P address from hamachi is highlighted on the following image.
The I.P address at the top of your hamachi window is your I.P address. The I.P address of other players on-line have also been highlited. For example, if cfc123 man utd was host i would type in 18.104.22.168 and I can add a new manager as long as he has done his part correctly.
If you have any questions don't hesitate to ask