I shared this a while back in the G+ community for LotFP, but here is an isometric map of DFD, perfect for Roll20. Almost all the rooms are there, just in different places. One set of crypts is in the shape of the evil sign. I think I relocated the evil sign to the door to room 2. Click to embiggen.
I made the vampire into a seductress. In my campaign, the PCs for the most part joined her and then she took them with her to be lich kings in the new undead empire.
Want to give feedback? Share this on g+ and give me a tag (+claytonian JP) (if you want to keep it private, share with only me).
If you spot a typo or don't have g+, you can just email me. Claytonian at the gmails.