How to set the SVN client working:

Backup important scripts.
Delete your unity proyect/svn folder on your computer. Start with an absolute clean computer.
Create an Unity project.
Go to that folder. Right click->SVN Checkout.
Enter the following URL: http://svn.afinteractive.net/preyinsight/trunk/
You will be warned that the folder is not empty. Click ok. Wait for the update.
Now, you should have you Assets folder filled and a new folder called Reference.
Open Unity and open your project. Don't close it.
Go back to your proyect folder. You should have 2 folders ready to be added to the SVN: Library and Temp. Temp wont shouw if unity is cosed.
Right click on Library-> Tortoise SVN->Add to ignore list-> Library.
Right click on Temp-> Tortoise SVN->Add to ignore list-> Temp.
Want your Visual Studio in that folder? Simply create your project there, then repeat the last pass for your Visual studio solution folder.

Done!

Now, please note that using this format you are only commiting/updating the Assets folder and your Unity proyect will not be shared!!!!

Solution: On the root folder of the SVN we will have a file called Library.zip that will contain the current working library directly from the master computer of the project. That means that any time you want to update your project library, you only need to unzip that file and replace your Library folder. Easy as cake.