did you right click on the files you want to add and select "tortioseSVN.." and "add.."?
what do you mean it wasn't allowed? what was the message you got?
when adding new files to the project you have to right click on the file and select "add.." and then do an svn commit.
I can easily do the Art folder once we decide what unit and building art is to be included. I assume the same terrain, improvements, and LH art to be used.
About the buttons matt...you said you had an idea?
It was a lazy evening for me, sorry. Didn't feel like modding.
Okay, I added CIV4PlotLSystem.xml to the project. Do an svn update(you will need to move the CIV4PlotLSystem.xml to another folder first), copy and paste the change you made to CIV4PlotLSystem.xml and then do an svn commit.
It worked for me. Here's a zip version of that XML file Geo.