The Necrocarcerus House Rules Document is complete!
Download the rules from this link. It's a 651 KB PDF file.
The Necrocarcerus map is available from this link. (1.77 MB JPEG)
With these house rules and a copy of Swords and Wizardry Complete you should be able to create and play a character in Necrocarcerus. Necrocarcerus is a Flailsnails game though, with dead or living Flailsnails PCs welcome to adventure within.
I appreciate any and all feedback on it that people want to give. Anyone who wants to play in the Necrocarcerus game, which will be running biweekly on Saturdays at 9am EST starting this Saturday, is welcome to find me on G+ and let me know so they can be invited.