YAY! I got it to work!
1. Just copy the flvplayer folder from the LAMS install to your editor/plugins folder under fckeditor
2. Add this line to your custom_config.js:
FCKConfig.Plugins.Add( 'flvPlayer','en') ;
3. And add [tt]’flvPlayer’[/tt] to any of your ToolBarSets:
FCKConfig.ToolbarSets["standard"] = [
['Source','-','Preview','-','Templates'],
['Cut','Copy','Paste','PasteText','PasteWord'],
['Undo','Redo','-','Find','Replace','-','RemoveFormat'],
['Bold','Italic','Underline'],
['OrderedList','UnorderedList','-','Outdent','Indent'],
['JustifyLeft','JustifyCenter','JustifyRight','JustifyFull'],
['Link','Anchor'],
['flvPlayer','Image','Flash','Table','Rule','SpecialChar'],
['Style'],['FontFormat'],['FontName'],['FontSize'],
['TextColor','BGColor'],['FitWindow','-','About']