Although the detail will vary depending on which version of MEP you are using (or VDL - you haven't exactly narrowed it down!), in general you just add the object in the usual way. Drag it onto the timeline (or, even easier into the Scene overview) at the beginning or end.
I'll assume you know how to add titles from the Titles tab? (That's well-covered in Help, but it's fairly intuitive anyway after you start with the hotkey Ctrl+T.) If so, are you saying you need titles that are more 'special' than MEP's title templates? They cover a comprehensive range, both static and animated, with all your PC's fonts at your disposal. And that range extends even further with some products into static and animated 3D types like the 57 I outlined in the later part of this tutorial:
But if you mean that you're already familiar with the built-in titles and want to add your own graphics, then have you tried doing that in your separate image editor? Once you've made a suitable BMP or JPG or whatever, import it as I described. I occasionally do this (using PaintShop Pro), for example when I want a 'bevelled' effect.
If you're more specific, and include details of your product, then you'll get more specific help.