http://aces.nmsu.edu/pubs/_l/l-103.pdfthe above link covers what you are after I think . I have done the alum version of tanning /curing , but not the others , so can't say how well they work . The Alum /salt version works very well , and I have done rabbits, sheep ,calf , badger , fox and all worked and lasted fine .
It is a long drawn out process , but well worth it if you want your own skins for personal use ie to make a hat . But if you want to cure them to sell , then you may be better off getting it done by a company , as to get them really first class is tough work . It really is a lot of work to get them soft , but still possible if ? you are determined to do it .
Hope the link helps , it explains the process far better than I could , I would forget important bits ....
cheers
Russ