Probably should have taken Dundee's offer. I know it's very small time but he needs a gig where they'll be little spotlight and low expectations, his personality means he won't cope in a pressure enviroment.
A few solid years in the SPL would put him in contention for the Rangers job, or possibly for a comfy Championship club.
He's well into his 50s, he's left it too late to build himself a proper CV by stepping up gradually over a 10 year period like most do. He can however have a cosy little management career somewhere if he doesn't set his sights too high.