Trying to build a DVD image, DVDSP4 says not enough space

With all due respect, that doesn't relate to the issue. I never said anything about how I encoded the footage. The issue is why it won't make the disc image, even though the project says it should fit and I have enough storage space.

How would you recommend I go about making a disk image out of a DVD Studio Pro project using Disk Utility?

Let me try this again, because I think we're not communicating.

I have authored a DVD Studio 4 project with menus and assets, etc. It simulates just fine. The tab on the top of the DVDSP screen indicates my project is 4.6gb. This means I should have no problem turning this project into a DVD. The computer I'm working on has no DVD burning capabilities so I want to create a disc image of the project instead of burning a DVD. I have done this before, where DVDSP encodes and builds a file that I can then use Disk Utility to burn to a DVD. So, once I have my disk image, I will transfer that file to another computer, and use Disk Utility on that second computer to burn the DVD from the disk image.

NOW

The problem I'm having is that DVDSP is not able to make the disk image. When I go to "Build/Format", it should make a disk image, but instead, I get an error saying there is not enough space on the output device. The "output device" in this case is my external Hard drive which has plenty of space. That is why I am asking for help.

That will create a Video_TS folder, not a disc image. I can't just drag a Video_TS into a blank DVD-R and have it make a DVD. I'm trying it now, anyway. It should take another 30 minutes or so. When that doesn't work, I'll just give up and bring the project to another computer 30 miles away that has both a working DVD drive and DVD Studio Pro. What a pain.