MIxing footage 1080p and DVD

I have a project where the majority of the footage is 1080p 23.976 and I'm working in those sequence settings.

I'll need to combine some footage from a DVD into this sequence, the DVDs are standard definition and interlaced.

What's the best workflow (and programs) to get the footage off these DVD's, de-interlace them, convert them to 23.976 and possibly
scale them up using a plug in?

I can work within Premiere if that would be beneficial instead of FCP7.

Thank you