NEW YORK - The trustee for the Borders Group Inc. (BGI) Liquidating Trust, which was formed in the wake of the Chapter 11 bankruptcy filing of former bookseller Borders Group Inc., on May 1 filed a brief in the U.S. Bankruptcy Court for the Southern District of New York opposing all proofs of claim asserted by its creditors (In Re: BGI Inc. f/k/a Borders Group Inc., No. 11-10614, Chapter 11, S.D. N.Y. Bkcy.).