What is a good video-editing program?

I am stringing together some clips from a ski trip on the computer program showbiz. I've worked on it for the last 5 months and when I finished it, I found that it will not save my file on the the computer so I can't download it on the internet or even make a DVD or CD (It saves it as a program file and I can't use it except on the actual program). Anyone know any good video-editing programs that won't use up a ton of memory, won't put a hole in my wallet, fairly simple to use and will let me actually burn a DVD? Must be windows XP compatible.