Been a while since I've seen them.... last time I saw a real show with them it was a 4 band show at Red Rocks, single best show I've ever been to.

In order it was:
Rober Walter's 20th Congress
Tenacious D
Galactic
Ween

Now, the last time I saw them and got to hang with them for a bit, they were doing an in-store show at Twist & Shout in Denver... I think I might even have a recording of that in-store somewhere, not sure if I brought it when I moved or if it's still in Denver...

But anyways, back to your questions, it doesn't say anything about an opening band, so I'm guessing they won't, specially being a show in the middle of the week, not sure how they usually do it around here... Not sure how long I've been listening to them...