Tips and tricks for using pseudo CSS in OpenLaszlo 4

[digg=http://www.digg.com/programming/Tips_and_tricks_for_using_pseudo_CSS_in_OpenLaszlo_4] Having had to deal with this stuff lately with the Dokeos videoconference development, I thought it might be useful. The mainstream page is located on the Dokeos wiki, so in the following weeks, I recommend, looking at it over there. Here goes... The new version of the videoconference tool (to be out at the same time as Dokeos 1.8.5) can be theme-modified via CSS.