For those who aren't aware the IAQG put out an auditor reference guide for AS9100, which is ISO9001 with additional requirements. It explains what auditors should consider.
A quick google search for "AS9100 auditor guidance material" will find it.[/COLOR]
The document can be found on the IAQG's deployment support materials website. Here's a direct link to the document.
Although it's geared toward the aviation, space, and defense industries, you're correct that it can be used as guidance for any ISO 9001-based QMS. In some sections it will go well beyond what ISO 9001 requires though, so keep that in mind if you're not working to AS9100.