Client Tools :: Force Parameter Value To Change Filename For Every Execution Of Sql Script

I wrote an sql script (spooler) which runs a select query and produces results into a file.

I want to have the filename with the year attached. Can i pass a parameter when i run the script from SQL*PLUS

@'B: Year Of FinancingPLSQLspoolersSpooler_File_Creation' 01/01/2010 2010;

the first parameter 01/01/2010 is passed to the select query and taht works fine.

Since the output file contains 2010 data, I want the spooled file to mention in its name the 2010, so User's can know the file contains 2010 data in it.

So i wrote the statement within the spooler script

SPOOL X:HARSOrganizationsFinancialDataFor&2.txt

&2 should take 2010 has its value and produce the file FinancialDataFor2010.txt

how to use Substitution variables to produce the Filename i want.