If you have already downloaded that then you may already have this. It contains projects, source code and help so it has to be downloaded, but only once!
Here's a tip. If you haven't defragged your PC for a while, I recommend you do it before installing Microsoft Visual C# 2008 Express Edition. For XP and 2000 it's easy. Just right click on the Start button and click explore. Now where you main drive is (Usually C:) right click on it and select Properties- it's normally at the bottom. Now click the tools Tab, select de-fragmentation and follow the instructions.
On the next page - Selecting the Install Folder
