My request is very similar to your request from last week. It appears like cutting and pasting is my best bet. However, I am losing keyframes - not too keen on that. I could render to .avi and pull that into my second session, I'm concerned about degradation, any further insights on that? Thanks for the previous thread.
In any case, rendering to DV, then bringing in this file to a new project as finished (no additional editing to be done to this section), there will be no re-rendering of this portion. It will be copied bit-for-bit when assembling the entire project. So anything within this portion will most likely only be rendered once anyway.