Im about to send out my paper work for my I751 but I dont really now where to send it...I live in Michigan...

The addresses to send to are on page 3 of the form instructions, left hand side.

in the instructions and guidelines for the I-751, you will see there where you are supposed to file.
http://www.uscis.gov/files/form/I-751instr.pdf

i hink you may have to file at:

USCIS Nebraska Service Center
P.O. Box 87751
Lincoln, NE 68501-7751


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The instructions to I-751 form says it all:

Where to File?


If you live in Connecticut, Delaware, District of Columbia,Maine, Maryland, Massachusetts, New Hampshire, NewJersey, New York, Pennsylvania, Puerto Rico, Rhode Island,Vermont, Virgin Islands, Virginia or West Virginia, mail your petition to:

USCIS Vermont Service Center
75 Lower Welden StreetSt.
Albans, VT 05479-0001

If you live in Alabama, Arkansas, Florida, Georgia, Kentucky,Louisiana, Mississippi, New Mexico, North Carolina,Oklahoma, South Carolina, Tennessee or Texas, mail your petition to:

USCIS Texas Service Center
P.O. Box 850965,
Mesquite, TX 75185-0965

If you live in Arizona, California, Guam, Hawaii or Nevada,mail your petition to:

USCIS California Service Center
P.O. Box 10751
Laguna Niguel, CA 92607-0751

If you live elsewhere in the United States mail your petition to:

USCIS Nebraska Service Center
P.O. Box 87751
Lincoln, NE 68501-7751

Good luck, make sure you get the form from the USCIS website I didn't and we had to start over