Hi,
From my limited knowledge, I can say that it is rather a multimedia question. I think, you want to make a stand alone presentation to show off your works, projects, and portfolio. My specialist friend says that currently Macromedia Direct x or Macromedia Flash is the best solution for such projects. You can create quality introduction, animation, and presentation with either director x or Flash. Flash is much easier and quicker. You can also find many ready made resuorces on Flash for free. Even free sound effects and intros. I say go with Flash. There are templates for you to download also on the web. Free or paid.
Post in the multimedia forum, and quantum can help you getting on with it, if you want to build a customized flash presentation. As far as I know, he has made quite a number of Flash presentations.
There is always the easy option available, that is powerpoint. But powerpoint presentation is old book and not really impressive. But if it is for the web, flash is the only way to go, I think.