Thanks, SVN is already set up fine - however we won't give anonymous write access. People can create patch files or ask me to be added to the dev list at SF.

The URL to get the latest version of the mod via SVN is:
https://italia-invicta.svn.sourceforge.net/svnroot/italia-invicta/trunk

If you intend to help us work with the mod, check it out to your M2TW directory (as bovi kindly described above) and you should be set up fine with a fresh folder called Italia_Invicta and the necessary batch and config file to launch the mod.
Once you verified it works, any changes you made will only be made to your local copy, because, as I said, I don't want to allow anonymous write access. Instead, you can create a so-called patch file. To do this, right-click on your Italia_Invicta directory and select TortoiseSVN->Create Patch:



After this, you will be presented a dialog asking you which files to include. Only select files you changed here.
Then a file selection dialog will pop up in which you can select a name and folder where to store your patch file.

Once you did all this, Tortoise will create the patch file from your working copy. Upload that file somewhere and send me a PM with information about what you changed and which revision (SVN revision) you based it on - and of course a link to the file.
Please also try to make sure that you work with the latest revision to create your patch.

If you want to participate on a more regular basis, I can also set you up as a developer at sourceforge. To do this, you will have to register an account there and then send me a PM with your account name. I will then review your application and decide if I'm fine with giving you write access (shouldn't usually be a problem). In that case, you can use the commit option as bovi described it above.