Well, now that the board has gotten over it's SMF hiccups, I can reply.
There were two different Dr. Doom voicepacks included in the original EZ Voice Pack Installer. The first one was from the Fan 4 mod, and contained 12 sound files. The second one was from Flying Infant, and contained 13 sound files. It sounds like he recorded the lines himself, and ran them through a filter to give them an electronic quality. To me, they all sound clipped short at the end.
I can pull one or both of the folders and zip them up to send if you'd like. btw, thank you for asking about this; I'd forgotten that they were there, and my Dr. Doom build didn't have a voice to go with it (since it was one of my later ones that I had to rebuild from scratch after the laptop was stolen). When I get the time I'll probably go back & open up the original Fan 4 files and see if there's any additional dialogue lines for Doom that weren't included in the voicepack that I could use or trim for use to pad it out a little bit. I did the same thing for Batman from the JLA mod, and I think also for Hulk, Thing, and the Human Torch.