After reading this question: http://meta.photo.stackexchange.com/questions/2264/walkthrough-qa/ - I was thinking about it some and had an idea (for what it's worth => )

Currently we tag questions based on certain topics and overall it works great. I believe it could be beneficial to be able to provide tags to answers as well. The tags would not be the same as the questions tags. The idea is you can tag your answer as to a type of answer. The answers then could be tagged as walk-through or step-by-step or something similar.

This is just an idea and needs more thought and input if even to be remotely considered.