Aspect ratio's in DVD Studio Pro?

[BsMx]

Hi:

I have vobs from an european DVD in PAL format, I'm gonna convert them to NTSC with DVD Converter included on MPEG2 Works.

My problem is that this DvD has mixed aspect ratio videos, the music videos are in 16:9 and the bonus features are in 4:3

I wanna know how can I author them on DVD Studio Pro so when I burn them and watch them on TV, the widescreen videos stay in that format and not display in fullscreen (I think the 4:3 vids will display fine in any configuration, but correct me if i'm wrong).

I hope you understand what I mean, and thanks in advance for any help you give
(P.S: I hope you understand my english)

[thoughton]

I'm not a DVDSP expert, so I would probably keep the whole thing in 4:3 but letterbox the widescreen content.

There is probably a more elegant solution...

[BsMx]

I found out how to do this!!!

thanks to everyone