Hey Crumbchildz, not sure if you're following this thread and if this is still relevant to you; you might want to keep it all 'oldschool' with a bunch of diodes and 3 bi-stable relays, all with one end at half-voltage of 4.5V. Three momentary DPDT's each switch one relay to ground and the others to +9V. You'll need the diodes to uncouple the DPDT's from each other.
No need for a microcontroller. What's missing is three LEDs, you'll need something like a millennium bypass LED on each effect.
I haven't tested it but I made a sketch and I think it should work. The 5V bi-stable relays from my IO-board will switch at 4.5V.
That said, if you wanna go all uP please go ahead
Drop me a PM if you're still interested and can't figure it out, I'll get an email that way so I can respond.