re-encoding hybrid material

[Matthew]

Now I have a PAL DVD which appears to be interlaced...which makes sense as most of the material was shot on video. But I'm thinking it could be a hybrid of interlaced and progressive.

I'd like to re-encode without de-interlacing, which is normally fine with pure interlaced titles.

I assume that just ticking the interlace box and 'alternate' in CCE will mean everything turns out fine and dandy, even for any parts that are progressive?

Thanks :)