go to the cave near the party house(vinnie's house) and do as follows:
1st switch off
2nd switch on
3rd switch off
4th switch off
5th switch on
6th switch on

in vinnies house the switches in the cave turn on the black,red and green or blue

If you know where the cave and Vinnie's house is at, you'll have no problem. Go into the
cave and turn ON blue, black and green. Go to Vinnie's house. You will notice the metal
door has opened. It's right through there!