When The Velvet Miasma self-destructed on stage in the mid seventies, band members vowed they'd never perform together again. But it's 1998, retro is in, and a reunion means big bucks. Thor, the band's egocentric leader, recruits aging hippie Paladin to dry out the lead guitar player and persuade sexy Maggie Thunder to return to the stage. Paladin's son replaces a keyboard player blown up on a Mexican drug boat. It's Eugene's big break. Then Thor moves in on his girl. When someone beats Thor to