My kid is not an "Aspy" (author's term) but he surely does have problems with transitioning, particularly from something like a computer game. My Aspergers Child: Helping Resistant Aspergers Children with Transitions
My Asperger's Child: Helping Aspergers Children Who Get Frustrated. -- A great piece on helping adolescents and kids with Asperger's who exhibit low frustration tolerance. Dealing w this a lot more as we begin the tween years.