Ok, let’s cover the two possibilities here. You’re still a wee bit confused, but that’s ok.
There are TWO limitations that people moan about with “ISO”. I’ll break them down:
This refers to an image of a disc. When you rip a disc to your hard drive, you can either rip the individual files on the disc, OR you can rip one big file that contains all the data from the disc. This file is often called an ISO file - since that’s the most popular format for the file. However, many people can’t put a file the size of a DVD onto their hard drives. If you use FAT32, you’re limited to 4GB under Windows XP/2k, less under Windows ME and even less under Windows 98. That’s problematic considering that most dual-layer discs are between 7 and 8 gigs in size!
In this case, you can’t put a SINGLE FILE bigger than 2GB onto a DVD. This is almost never a problem. I don’t have many 2GB files floating around, do you? You can easily put 4GB of files onto a DVD in one shot - so long as none of the files INDIVIDUALLY is more than 2GB.
While I imagine that SOME people might have big ol’ archives that they want to put on a DVD that are 3GB in size… it’s pretty rare really. Most of the time when you hear people complaining, it’s either because their program spit out a big ol’ MPEG file that’s too darn big to put on an ISO disc, or else they’re talking about not being able to rip ISO files onto their hard drive… or not being able to BUILD an ISO file and then burn it to DVD.
For example, my preferred method for shrinking a DVD is to shrink it to an ISO file and then burn it with DVD Decrypter, something I couldn’t do under Win98/ME, or with a FAT32 filesystem on my hard drive.
Does that clear things up?