Help with Parrallel Periods MDX script

I am trying to create a MDX script to compare all university applications for a term by a specific date.

This is what I have so far

SELECT
{([Measures].[Reseller Sales Amount])} ON COLUMNS,
{[Product].[Category].[Category].Members} *
{[Product].[Subcategory].[Subcategory].Members} ON ROWS
FROM [Step-by-Step]

WITH MEMBER [MEASURES].[PRIOR PERIOD APPLICATION] AS
(
PARALLELPERIOD
(
[Dim Date].[Calendar Year Number], 1,[Dim Date].CURRENTMEMBER
)
, [MEASURES].[APPLICATION]
)
SELECT
{([MEASURES].[APPLICATION]),([MEASURES].[PRIOR PERIOD APPLICATION])
} ON COLUMNS,
{
DESCENDANTS
(
 
[Dim Date].[Calendar Year Number], [Dim Date].[Calendar Month Name],
SELF
)
}ON ROWS
 FROM FACT_ADMISSIONS

Background info:  Applications for a specific term could happen 2 years out or within the year that the term starts.  In saying that, I need to be able to pick the term first and then sum the applications by year and month for a specific date.  Example, if the term was 2013 Fall, I would like sum all the applications for a certain date in the year to see how many applications were received.  Ultimately, I would like to be able to have a user choose 2 terms (2012 Fall and 2013 Fall for example) and the pick a date which the script would then compare the 2013 Fall term applications by the provided date but also the 2012 Fall term by the same date last year. 

It's a long shot but any help would be greatly appreciated.