FYI: The Downtown Alliance has created an online guide for the generous but confusing menu of post-Sept. 11 assistance packages for businesses south of Canal Street. The latest information includes rules on help with everything from employee salaries to accelerated depreciation, including the $5.5 billion in tax-based incentives authorized by Congress as part of its $37.5 billion Economic Stimulus Package. For a helping hand, visit http://www.downtownny.com/rebuilding_summary.asp. 5/3/02