I know April 1st is a long way off, so let me explain... Most of my mods specialize in audio. This idea popped into my head and I have an undying urge to know how to do it (I'm still new to modding and my internet searches have come up with nil). Essentially I want to Rick Roll all of my subscribers. Is it possible to make a track play upon login, then never again and how? And how would I go about creating a caption informing them they just got Rick Roll'd instead of getting power metal?

http://www.creationkit.com/Add_-_MusicType

Make a script that fires automatically when your mod starts (in a quest, using OnLoad() probably?) then have it add your music type, and make sure the type has "Plays one selection" checked.

Then it should play, then remove itself from the stack and go away.

Make sure to set a variable or stop the quest after so that the script only fires off once (per save).

For the message you'd wanna make a message, then show it using this: http://www.creationkit.com/Show_-_Message

Thank you so much! I think this is gonna be hilarious and I hope I can get even more modders to go along with it! LET'S RICK ROLL THE ENTIRE SKYRIM COMMUNITY!!!