Jumping in to point to a FPS issue I encountered using dgvoodoo and how I solved it: I have a 21:9 monitor and a AMD 6700XT. I wanted to play SC4 fullscreen and followed the instructions by rsc204
After setting everything and booting up the game, my graphics card went full blast, 1400+fps and 50%+ GPU utilization. I tried hard-capping the fps using AMD Adrenalin's "Chill" feature, but whenever I paused the game or zoomed in and out the FPS went up to the thousands for a few seconds, every single time.
Turns out, dgvoodoo has a FPS limiter built-in (as of version 2.74). To enable it, you first have to right-click on the big yellow banner at the top, and select "Show all sections of the configurations"; you will then see new a new tab next to DirectX called GeneralExt; on the lower right section of said tab, you'll see the FPS option set to 0; change to whatever number you desire (in my case, 30) and that's it!
I'm now a very happy Major, building at 2560x1080 with no issues! Hope this is useful to whomever encounters the same problem in the future!