Hi John,
You can get root beer from both Lure Craft and MF. If you're talking about Zoom's "Root Beer Pepper Green", you just need to add about 1 drop of root beer per ounce of plastic, then add some medium black & green flake.
Pumpkin will work too, but you might need to go a little darker.
And one more option.......
if you're out of both, in about 6 ounces of plastic.......add 4 drops of watermelon and 3 drops of black grape. Sounds dumb, but it makes a really nice root beer; almost identical to Lure Craft or MF.
Hope this helps
Chris