From Endnote (X2.01)'s help file:
Corporate Authors
When entering corporate authors, put a comma after the name:
U.S. Department of Agriculture,
Apple Computer Inc.,
This ensures that the entire name is treated as a first name, so no name manipulation will be applied.
If your corporate author name includes a comma in the name itself, use two commas in place of the first comma:
University of California, Irvine
EndNote treats this as a last name followed by a blank first name. Then, everything after the (blank) first name is appended, including a second comma in the name. The formatted result is the corporate name with the commas in place.