You need to read up on tapeless workflows. Ther are Tutorials here on the cow.
As for other editing systems – you give them the card media, the P2 files. Any editing system worth its salt can ingest P2.
Always transfer your card media, use P2CMS and verify the transfer to the hard drive, back up your card masters. L&T from the hard drive NOT the camera.
If you L&T your P2 Files to ProRes codec or DVCPROHD codec, and give the mov’s to another comp, they need to have those codecs on that machine.
Chris Tompkins
Video Atlanta LLC