Well it looks like it's as confusing for you as it is for me
Thanks for your reply, which is indeed useful as clearly Adobe have made this task easier and less obscure in CS4 by adding simple interface functionality, however I'm stuck with using CS3 for the moment. Its not majorly a problem as the video material in question can be exported uncompressed then setup with cue points using the Flash encoder as an alternative (i.e. or even After FX CS3 also) which both provide the same features as Premiere CS4 seemingly. It is just that it would be much easier to be able to drop in simple markers whilst working with Premiere CS3, as this is what we are going to be using primarily, I just wondered if anyone knew how to invoke this in CS3 - its possible you can't, the documentation is vague at best!
However I really appreciate your response and help, thanks