1 - In Poser or DazStudio almost every change in the geometry is done by morphs. Only some dynamic things cna be done like cloth (using plugins, but you can model your cloth in DS only in Poser).
Carrara have a simple jiggle plugin that can be used to move breats and other body parts, you can also create dynamic cloths using proxy objects (low resolution meshes), but all this take a lot of time to get a good work done and sometimes a morph can be more easy to control.
I think this video use Maya or another 3D software to get a very good jiggle effect in the body, but dont think its easy as pose and the animation is done, theres a lot of adjustments to the dynamic generation of the movement and a lot of maps to be painted to control all this thing. Also note that the bra its a texture painted in the breat already.
I think that the new Genesis have bones for the breasts too now, that cam help a lot to create this kind of movement. Here at renderosity theres a plugin that can add this bones to V4 too, dont remeber the name of the plugin or vender now.

2- Propers are non boned objects (almost non boned), like plats, glasses, cars, or even some dynamic dress.

3 - Production frame can be changed in Render Room in Camera Settings, just change the size of width and height of your final image render as you want.

4 - Error has occurred is someting that happens to all Carrara users, check if you are usint the lastest version. Youtube have a lot of basic tutorials about hair.

5 - Carrara have a GoZ plugin that create the bridge between Carrara and ZBrush, and its very easy to use. Here at Renderosity have a set of tutorials about how to import models from any software to ZBrush and paint ans create morphs. The real point is that the morphs need to have the same amount of points that the original mesh to work, and follow the same order too.

Some tutorials to you:

Search for Poser2ZBrush set of tutorials from http://www.darkedgedesign.com/

GoZ for DazStudio (already exist for Carrara) http://www.youtube.com/watch?v=mFRUVZHW_hw

Carrara to ZB http://vimeo.com/19598352

DazStudio morphs in ZBrush http://www.4colorgrafix.net/blog/2010/09/10/learning-zbrush-4-morphs/

DazStudio to ZBrush PDF: (yes its a long URL)

http://www.google.com.br/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&ved=0CHAQFjAG&url=http%3A%2F%2Fweb.me.com%2Fmarcgebhart1%2FNew_Site_Under_Constuction%2FDaztoZBrush_files%2FDAZtoZB.pdf&ei=p9oFULy8PJOY8gTFzOnwBw&usg=AFQjCNG1uvAHrOR2fSP-ZwtFb4UF52WR_g&sig2=CzGNtobE_f7Pj6OplMnTCQ

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