A couple of options depending on your version of SQL to exclude microsoft objects.

In SQL 2005, there is a field called is_ms_shipped. It's a bit value. 1 means it's a microsoft object, 0 if it is not.

SELECT name

FROM sys.objects

WHERE type = 'p' and name not like 'sp[_]%' AND is_ms_shipped=0

ORDER BY name

To use this in SQL 2000 you would modify the SQL code to this:

SELECT name

FROM sysobjects

WHERE type = 'p' and name not like 'sp[_]%' AND OBJECTPROPERTY(object_id,'isMSShipped')=0

ORDER BY name

Thanks for sharing this code.