You can't set the month start and ending dates within the month. As you've
discovered you can set the month where that marks the beginning of the
fiscal year, but the fiscal month will always coincide with the calendar
month start and ending days, ie, starts on the 1st and ends on the 28th,
29th, 30th, or 31st depending on the month and there's no way to change it.
I know I sound like a broken record but Project is not a financial
management application - rather its financial functions are pretty well
limited to budget estimating and tracks actuals against budget basically to
monitor performance against estimates. The sort of relatively sophisticated
financial reporting it sounds like you've been requested to provide are well
outside its scope and you're better off exporting the raw data collected in
Project into a more suitable tool.
--
Steve House [MVP]
MS Project Trainer/Consultant
Visit
http://www.mvps.org/project/faqs.htm for the FAQs