"Blue Lab" is awesome! Would match perfectly for a prologue in an oldschool shooter like the train scene in Half-Life 1. Wonderful work. Keep it up!

I like the idea with the theme packs. Especially non-orchestral shooter music is very rare. Ever thought about an Unreal 1 style music pack? : http://www.youtube.com/watch?v=--5COmk8ZM0&feature=related, http://www.youtube.com/watch?v=LPcJOnwWhF4&feature=related
I love that oldschool instruments. They sound awesome, interesting, powerful, non-mainstream and unique. Just like the game