Yes! Yes! Yes! :) You have the perfect combo - CD burner and Nero! Burn a CD (or so) at your earliest convenience to back up your Runtime directory. If you've read any of the horror stories in this forum about people who've lost everything because they don't back up, well, let that inspire you to do it. Since you're dealing with more than 1GB, you should 'divide and conquer' the Runtime. More than likely, the two largest folders within it are the Geometries and Textures folders, so see what size they are and how each can fit onto a CD of its own if necessary. If you have more than one physical drive, I'd suggest making a copy of the Runtime to the other drive first and dividing and backing up that. Although it takes a while to copy all of these small files, it will allow you to create folders representing each CD that you will create with just the right amount of data in each. Don't be cheap - use the largest CD's that you can find (700MB, I think). Make sure that you are creating a data CD and that 8.3 and DOS compatible are turned OFF. Good luck! :) BYS