Personally I think the best approach for texts is to force them into a bounding box at the bottom or top of the screen. At least that way, you know they are always going to be in the same position & displayed correctly.
Ahah yes, that's the easy way
Probably what I'll end up to do if I don't succeed to create bubbles.
That would be an excellent idea to add a box/bubble option to all text action parts in future versions of VS (I mean... someday). Even a very simple box with no shade, no texture would be nice, if we can change the color and transparency. As long as the box is always placed behind the text, and resizes depending on the quantity of text inside, it's good.