>In regards to fix a bug of the use of WWC in our VFP Web application, I've been told to set IIS isolation to low. I don't have any idea what this is. It seems in IIS 4, it is known under another term. Something like ISP apps in process or something like that. Where should I go to set this up?

You'll find it in the Control Panel -> Administrative Tools -> Internet Information Services. Select your web site and right click on it, then click on Properties. Click on the Home Directory tab. You should see the "Application Protection" at the bottom. One of the options is "Low (IIS Process)".

HTH