If you change your CS2007 MachineName, Beware of these

Fix Commerce Server 2007 After Renaming Machine Name, by Max AKBAR

Change your BizDeskHostname if you see “Bad Request (Invalid Hostname)” when you try to open your siteTerms, or profiles in Commerce Server Manager. SAMPLE SCREENSHOT
Reference.

Other things to consider about CS2007 when you change your machineName:
http://social.msdn.microsoft.com/Forums/en-US/commserver2007/thread/616f5519-585a-4d28-8d24-49f1053e3e42/