Daryl,
I have an 1863 map of Lapeer county (on CD also) that also breaks down into towns, villages, townships, business owners, etc...
It sure would be great to hear from you.
Bill
If you go to the Michigan forum at the bottom and go to the 2nd page I have a post titled"a very interesting map site". There is a link to the first plat maps from the 1840-1850's. One other site you might want to check out is Michigan county histories and atlases. It has plat maps and other research stuff.
Wolverine.