I have a number of servers that I need to monitor, both SQL Server 2000 and 2005.  I use similar code with an SSIS package to collect this information from all my servers to one database on one server.  SQL Server magazine had some articles (http://www.sqlmag.com/Articles/ArticleID/95385/95385.html and http://www.sqlmag.com/Articles/ArticleID/95745/95745.html) that had information on how to set this up.  Of course, you need a subscription to the magazine to read the articles.