Death and taxes

In the course of putting off filing my tax returns (I don't know why. It's hardly difficult) thoughts wander to other things. Other inevitabilities. And so - how can I start planning my funeral? Is there some way I can do it in advance? Specify a non-religious memorial service (the very word "service" seems innately linked to religious ceremony. Have things reached a critical mass?) Ensure that people sing the songs I want (in particular "The Red Flag" and "The Internationale" - as much to annoy my relatives as anything else). And, as the coffin enters the ground/furnace/whatever, the strains of AC/DCs "Highway to Hell" kick off - well, I like the idea...
Or a more organic burial, wrapped in a cloth, in the woods somewhere - seems nice. Still want the music, though.