I've never done this before, but it seems like you could unravel (or snip?) the cast on edge and frog a bit from that end, then bind off.
Mommy to two wonderful girls
"I don't have to conform to the vagaries of time and space, I'm a loony!" -Campbell Bain (David Tennant) 'Takin' Over the Asylum'
OTN: Cabled Sweater
, arm warmers, kids' clothes