"so i wont try it, because otherwise i will ruin my game"
I don't have a lot of Orbiter experience but I see phrases like this often in the forums. I haven't tried jsgme yet but it seems like a good idea.
Over the last month I have been using Orbiter 2010, I have probably re-installed it a hundred times. My suggestion is to embrace it! I have a small group of add-ons I really like and have customized them to the way I want. Instead of worrying about losing them, I just organized them and saved them. I made some detailed notes about how to install them from a fresh start and even combined some of them to really simplify the process.
I probably use 3 or 4 different installations at any given time. If I try something new, I use one of the test installations. If it gets cluttered or starts crashing because I mess up new stuff, I just can it and start a new one. I can do a fresh install, add sound, a few favorite modules, and my favorite 'test' add-ons in about 5 minutes. A few notes help keep it all sorted and working well. I also seem to keep jumping back and forth between 2006 and 2010. As PhantomCruiser says, its just plain fun (and educational).
When I was an Orbiter user about 10 years ago, I was always afraid of crashing it. I was afraid to dig onto files and change stuff. This time around, I dove right in changing files and learning what they all do. Its a whole lot more fun and less stressful. Just install a new one!