Ah, yes the poor office set up - definitely been there, done that. I was given a broken chair the first year I started work (it kind of leaned permanently forward) and after I couldn't get anything done about it for months, secretly smuggled in my own chair from home one weekend, deciding that I actually spent more time sitting at my job than at home. A short time after that, everyone got new chairs >.<

You're welcome :-) I hope that the exercises/stretches might help you as much as they've helped me work out a kink or two!