I made this a while back and just now found the picture, so the actual amounts are a bit fuzzy, but this is basically what I did:
For the bottom layer, use jello pudding. We used chocolate and substituted the cold liquid for chocolate liquor. We added a little knox as well so it would harden quicker.
Be sure to let the bottom firm up before you do the top part. For this, we used cherry jello and substituted the cold liquid for cherry vodka. We also added a cherry just for fun 🙂