It's an interesting approach, however, unless you have a tool that understands the format utilized by the game, it is likely impossible. Let me see if I understand correctly- each resource file is numbered according to the CD it is in? Like Resource1.AUD on CD 1, Resource2.AUD on CD 2 and so on? If that's so, why not just copy all these files to the same folders on the DVD?

If the names are the same across the different CDs, using the copy /b A + B should not work as the game won't know how to handle this larger file.

The names are the same for each CD I just named them with numbers so I would know which was what, when the cd to dvd progie made all the files there was one file for Resource.AUD with a large file size that tells me all the individual files are joined somehow and now that I have reread here: http://www.sierrahelp.com/Games/GabrielKnight/GK2Help.html it says "His installer also has the advantage of allowing you to installing to and running the game entirely from the hard drive. There is also an option to let you create a single DVD to replace the 6 CDs. No more swapping out CD during game play. It is possible to install the DOS version into this Windows only install to have these advantages, but still use the DOS interpreter for DOSBox".... so I will have to try his installer but I have a hunch its the same one I used otherwise if I can combine the AUD files I would be set.

Interesting. It is a patch, so it surely changes stuff around; maybe it patches the game executable, maybe it changes some config file(s), or those combined. The method of simply combining the files wouldn't work unless there's a tool to do that properly or that the game is patched to know how to handle this new larger file, or both.

Some more info on how to make a DVD install:

Gabriel Knight 2 dvd???

Those instructions are just the same as what is already said in the cd to dvd program in the exact words none the less and I am still scratching my head thinking how to make a Dos version I mean there must be a way....