Glad to help.

• Nope, not that I know of.
• If it's a small section (to refrain from using the word snippet in it's definition) of code that is more general and can be pretty much plugged into a larger program, then I'd put it in Snippets. For larger stuff that's more standalone, I'd use Code. There really isn't much more a cutoff than that. If you want a better idea, take a look at some of the nodes in snippets and code.

Added graff has some good suggestions (probably better than mine as he's been here longer) for how to categorize your code.