Hey, looks like I have a part of the answer.
http://forums.adobe.com/message/4290664?tstart=0
Here is a topic with basically the same problem, batch swapping low res to high res will be done by ppro cs6 ONLY if files haves same name and same extension. This topic is for mxf from xf300, not same as p2 but quite close.
So What should I do,
1) create two identical media path on hard drives, first with transcoded high res media (ex pro res 4.2.2??) the other with low res (pro res proxy or lower). It means that i have to copy p2 media, then transcode (and keep the original as a backup) into something I would be able to compress and easely rename (I am thinking about P2 directory path)
Or
2) Should I use direct p2 mxf as a high res, and create a second media path using media encoder, to create dvcpro SD or lower P2 files as offlines files.
Maybe both way are working, what do you think?
thx
cheers