all you have to do is change the version check from

IF @OSVersion = '5.2'

to IF @OSVersion >= '5.2'

umm yeah thats easy.

also I know this is an old thread but I am using this due to an issue I am having using the maint cleanup task not working. this is kinda slow if you call it repetavily and with many file.. I use a cursor to call it and it takes abt 20 min. Not really in a hurry though

DECLARE @databasename as varchar(200)

declare @strSQL as nvarchar (4000)

DECLARE Curse CURSOR local fast_forward

FOR

SELECT

name

FROM

master.dbo.sysdatabases

WHERE

name not in ('tempdb','AdventureWorks','AdventureWorksDW')

order by name desc

OPEN Curse

FETCH next FROM Curse INTO @databasename

WHILE @@fetch_status = 0

BEGIN

set @strSQL = 'EXEC DBA.dbo.usp_Admin_Delete_Files_By_Date @SourceDir = ''\\resnetapp01\prodsqlbackups$\NIGHTLY\RESMSSQL2008\' + @databasename + '\'', @SourceFile = ''*'', @DaysToKeep = 5'

EXEC dbo.sp_executesql @strSQL

fetch next from Curse into @databasename

END

close Curse

deallocate Curse