waltrich,
The easiest way imho to download and burn a Solaris 10 DVD would be using the Sun Download Manager, as it will allow you to continue to download the various images you need to create the DVD if the download has been interrupted. Once that's done, for example you will need to combine them to create the iso. so from the command prompt, change directory to where you downloaded the various images and type:
cat /b file1 + file2 [+ file N] filename.iso
Note: file1, file2, and file N would be the various iso images you downloaded. The filename.iso would be whatever name you want to use as the name of the DVD that you want to create.
Once the iso is created use you're favorite CD/DVD burning software to burn the iso. I use SonicNow on Windozzzzze but that what the wife's computer has on it.
Hope that helps you out,
Dave S.