Howto disable SPS OnLine gallery

I'm quite frequently doing demos of SPS2003 with virtual PC on a portable which is not connected to the network. Now if I tried to add a webpart with "Modify Shared Page\Add webpart\Browse..." it always took for ages. It seems that if you disable the Online Gallery, things will speed up significantly. To do this, go to "SharePoint Central Administration" > Configure virtual server settings > Manage security settings for Web Part Pages... In the Online Web Part Gallery section, click disabled to prevent access to the gallery.