To Get Version of SSIS

run DTEXEC /Ver from the command prompt it will give you Version
remember version gets increamented when service pack is applied on it

Calling functions using Linked Server on SQL 2005 (Openquery)

instead of the following query
Select * from Linked_Server.northwind.dbo.square_value(10)
run a query with the Openquery function:

Select * from Openquery(Linked_Server,'select northwind.dbo.square_ value(10)')

If the user-defined function takes variable or scalar parameters, you can use the sp_executesql stored procedure to avoid this behavior. For example:
exec Linked_Server.northwind.dbo.sp_executesql N'SELECT northwind.dbo.square_value(@input)',N'@input int',@input=10