HELP, i have trouble!

Hey, guys…
I am trying to fit many video files(about 20) of about 30min each to a dvd. I already managed to convert some of the original dvd files from 700mb per file to 200mb per file. (using nero digital)
My next problem is how on earth do I get them on dvd??? I tried to “make your own dvd video” with nero7, but the program just converts the files back to 700mb. Next I tried to make a VCD image file with nero7. Although it wouldn’t fit on a CD, I was hoping to burn the image to a dvd when it was finished. But…. It didn’t finish, I get a error every time, just at the end of the process.
Could anyone give me some help please!!!

p.s I got the idea when I was in Nigeria, they sell pirated dvd’s on just about every street corner. I bought a dvd with 9 movies on one 4.7gb disc for $2.5