In IIS on XP there is only 1 web site "Default Web Site" and there is a limitation that there can only be one web site because MS doesn't want you to use XP as a server, on a server you can create multiple Web Sites, or you can explore workarounds like Slaven suggested.

For using folder based sites in mojoPortal, the first site must be a root web site NOT a Virtual Directory. Currently you have a Virtual Directory named mojo that points to the folder where the mojoportal files live. You need to point Default Web  Site at that folder, right click Default Web Site and go to properties point  Home Directory to the mojoportal. Then the first site will work at http://localhost, which corresponds to Default Web Site.

Hope it helps,

Joe

No, you don't need any Virtual Directory for the folder sites, once mojoportal is running at http://localhost just go to Administration Menu > Site Settings, see the dropdown near the site name, choose new site, create the site, then on the Folder Mappings tab create the folder mojofrance, now it will work you can visit the new site at http://localhost/mojofrance/Default.aspx, if you want it to work without the Default.aspx then create a folder beneath the root of the main site at /mojofrance using Windows Explorer. Put an empty text file there and name it Default.aspx

Hope it helps,

Joe

This is a bug that has been fixed if you upgrade to version 2.2.9.5

Best,

Joe