TNT / Icarus / HTP / PG soundtrack authors and titles?

Does anyone know who composed which songs from these soundtracks?

Are the Icarus tracks named something? The only ones that I could identify were Tom Mustaine's, because they're on his site; and Tolwyn's, because they're identified on the Doom Wiki articles for the maps, but that leaves out all the others.

Also, are all the non-Mustaine tracks in PG and HTP by L.A. "Anavrin" Sieben and does anyone know if they have actual titles?

I tried to hunt down the Icarus stuff, but my brother, a huge Rush fan at the time, identified that almost all of the Icarus songs have bass lines ripped straight out of Rush tracks. Never did learn anything more about them

im curious about this too

Edit: Cancel that. Different wad entirely.

I'm also interested in this.

When Tom was posting in a thread a few weeks back, I tried to ask him, but he stopped replying right before I posted. :|