Zelda's Butt is an interesting quest by Spram. ZC 2.10 quest, but works fine in 2.5. Not sure why or how the quest got its name, but once you get past that bit of oddness, the quest is actually pretty decent. Main quest isn't that long, but since we're going to be trying to get everything, the optional stuff pretty much doubles up the quest length.
Seriously, that's just an odd name for a quest. Sounds really perverted and all for obvious reasons =P
Part 1 - a bit of side stuff to do before getting to level 1, picking up lots of money along the way. Yeah, we'll be needing lots of money later on when we get to optional stuff.