(written from a Production point of view)
Scott Booker played an Orpheus Colony miner in the Star Trek: Enterprise episode "Demons". He received no credit for this appearance. His costume was later sold off on the It's A Wrap! sale and auction on eBay and previously worn by a stuntman in Star Trek Nemesis. 
Booker is the manager of the band "The Flaming Lips" and appeared in this episode with fellow cameo performer and "The Flaming Lips" band member Michael Ivins, as well as Booker's wife Jennifer Booker. He is a friend of Connor Trinneer and took the chance to play a role in Star Trek after he was invited by Trinneer. Booker is also the owner of the Hellfire Enterprises Ltd.
He also made a cameo appearances as a psychiatrist in the 2005 film Christmas on Mars. "The Flaming Lips" performed the soundtrack for this film. As manager of "The Flaming Lips" he is also a producer for several productions including the documentary Fearless Freaks in 2005 and the live concert special UFOs at the Zoo: The Flaming Lips Live in Oklahoma City (2007).