Anyway to write VB/C#/C++ scripts in SQL 2000? Need financial calculations (IRR, NPV, etc)

I'm working on a SQL 2000 database server (I know .. but it is what it is unfortunately), and I need some way to run financial calculations like NPV, IRR, etc. In SQL 2005 and 2008 I use a custom CLR that calculates these via the Excel Interop, but in the SQL 2000 world CLR is a no-go.So firstly does anyone know of a simple way to run these financial calcs? I've tried a few canned functions that supposedly calculate them, but they never tie back to what Excel shows.And if not is there anyway to write a COM object or possibly call a command line application which could be written to accept the parameters and return the correct values?Thanks for any suggestions.