Changing content of Text in animation

hi,
I’m currently working on a small Video Project using blender’s sequence editor.
Now I want to archieve a effect like in the beginning of … yes, let’s say “Terminator 1” :slight_smile: - some kind of blinking terminal font typing ahead. I am aware that i can change location, color, things with the ipo controls, but how to change the content of a text object? Lets say I want to change the text string “Hell” to “Hello” within the sequence. Is that possible? Only with scripting, or can i use the Game Engine?
Thank in advance,

Bjoern