How to make multiple layers with DVD Architect 4.5

I’m a newbie and I’m French,
I’ve got 4 videos form 4 different angles and taken at the same time, so I would like to make a multiple layers video with DVD Architect 4.5
If you can do so, please help me !
See Ya
@R’n0 X1

I just find out why I could not do so,
I’ve got DVD Architect Studio and not DVD Architect Pro,
I know what I have to do,
@ R’n0 X1