If I am mixing and matching Cineform AVIs converted from an HVR-V1U and a Canon DSLR T2i. Should I be using the YUV or RGB preset? I'm really unclear about it, does it matter since they're both 4:2:0?

Also, while we're on the topic of presets, I've begun to re-size my HVR-V1U footage from 1440 to 1920, but back when I was using Aspect HD I had everything at 1440x1080 and all my sequence settings were set as such in Premiere Pro CS3 and when I converted it to Prospect HD in CS4 the 1440 presets were retained. However now that there aren't any 1440 presets in the new Cineform NEO product, what can I expect when I import my CS4 Prospect project (orginating from Aspect HD). Should I expect to run into any issues?

EDIT: Sorry, I did not notice that things were split into 2D and 3D. Just discovered the 2D folder has more presets. Not sure why 1080p stands alone in the root.

You have some old presets, you can delete them

In:
C:\Program Files\Adobe\Adobe Premiere Pro CS5\Settings\SequencePresets\CineForm

you should have only 2D and 3D folders. There are 1440 and 1920 presets.

David
What about the YUV vs RGB issue.
Seems like CF editing was always in YUV before, was it not?

No, CineForm is RAW, YUV, RGB or RGBA, only NeoScene and NeoHD are YUV only (for encode.) Presets should render previews to YUV, not need for RGB datarates.