Hey hey, I can totally relate.
I've been an IT manager for over 5 years, and I want out of this rut. I'm doing a science Access course, with a view to getting on a Radiography degree next year, and I completely wholeheartedly recommend the Access course. It may seem pointless at first but it picks up really swiftly, and it's quite respected among admissions tutors.
Go for it, and good luck with your career change!