Hmm, with your responses I wouldn't be to alarmed about enabling lock pages in memory then, but it is still good practice to have it enabled.

You may want to read up on these articles: http://blogs.msdn.com/psssql/archive/2007/05/31/the-sql-server-working-set-message.aspx

http://blogs.technet.com/askperf/archive/2007/05/18/sql-and-the-working-set.aspx

http://support.microsoft.com/kb/918483

http://weblogs.asp.net/omarzabir/archive/2007/10/19/a-significant-part-of-sql-server-process-memory-has-been-paged-out-this-may-result-in-performance-degradation.aspx