yes charcloth.. my qualifications include a degree in music and a degree in music therapy (about 7 years schooling here in canada).
i would be suspect to of a weekend course because it will miss on many of the important aspects of becoming a music therapist (registered in canada and Board Certified in the US.)
it dosn't sound like you'd get much from it with you previous experience and like you say.. probably not worth your while.... I'm sure you could go into any facility and offer your services, but be careful not to mis represent yourself and your qualifications, it could open doors to problems for you..... other than that.. go and do......
musicman