I don't know if this will reach you since your posting is dated 31 May 2001.
My wife's connection to the McFerren / Fetterhoff line in Guilford Twp. Franklin Co., PA, comes from the Peter and Elizabeth [Fetterhoff] McFerren union.
Peter McFerren - b. 1 AUG 1792 / d. 22 AUG 1856 m. MAY 1818 Elizabeth Fetterhoff - b. 19 MAR 1790 / d.11 DEC 1859
Peter mcFerren's Parents: Henry McFerren, Sr. - b. 20 JAN 1764 / d. 19 APR 1834 m. 1784 Susannah Knepper - b. 1757 / d. 2 FEB 1832
Elizabeth Fetterhoff's Parents: George Fetterhoff - b. 27 SEP 1760 / d. 23 SEP 1819 Katheirne [?] Fetterhoff - b. 25 JAN1766 / d. 22 APR 1848
The Fetterhoff information came from "The History of Fetterhoff Chapel, United Methodist Church" by Helen I. Kaiser, Copyright 1985. I got my copy from Matthew D. Plant, the pastor of the Fetterhoff Chapel, 4073 Fetterhoff Chapel Rd., Chambersburg, PA 17202-9376. The church is not in Chambersburg but in Guilford Twp. but for Post Office reasons it is listed as Chambersburg. If you are interested a donation, I am sure, would be appreciated.