You don't like the cutoffs that MS uses?
If that's the question, then I add an extra field to raw data that returns the
quarter (and year). Then use that in my pivottable.
I like this format:
FY2010Q01
or
2010-01
so that I can sort in nice ascending/descending order.
If the quarters start on the first of a month, then I use this formula to show
the fiscal year and quarter:
="FY"&YEAR(A1)-(MONTH(A1)<#)&"-Q"&INT(1+MOD(MONTH(A1)-#,12)/3)
Where # represents the first month of the fiscal year.
So if the fiscal year starts on July 1st, then I'd use:
="FY"&YEAR(A1)-(MONTH(A1)<7)&"-Q"&INT(1+MOD(MONTH(A1)-7,12)/3)