Here's some links on the corporation sole:
http://hushmoney.org/corporate-sole_facts.htm
http://hushmoney.org/corporation-sole_myths.htm
http://hushmoney.org/corporate-sole_probs.htm

And here's a couple links on Burney Brushears specific to the corporation sole:
http://hushmoney.org/corporationsole_reg.htm#Gamaliel
http://hushmoney.org/gamalielministries-email.htm