Going back 6 generations is an excellent effort. However, to track down further generations on your husbands side would be an extremely difficult and almost impossible task for anyone here in Australia as far as researching goes. One would need every birth, death and marriage date and where it took place of everyone of the 6 generations that you say you have. I can then make some attempt to help you with you're ongoing research as I would find some researchers in the U.S.A to help as this is essential.
Ian Wills ( Melbourne - Australia )