Is the SOD source out there? I've looked around and can't find any trace of it. Or are all the so called SOD add-ons just using the wolf3d code with countinous levels?
Try visiting www.areyep.com
Then go to MCS Coding section... It specifically tells you how to compile the SOD side of the code.
@Sentenced... Yes, the SOD code is contained within the same WOLF source code.. You just have to follow the tutorial by MCS to enable it. It's actually quite easy.