Saving a Partial span shot

Yesterday we filmed a shot at the end of the day which turned out to be the best shot of the day.

The shot ended up being one of those shots where it started at the end of one P2 card and ended on beginning of the second P2 card.

We are shooting again on Friday and I need to clear out the P2 cards for new footage.

I've copied the CONTENTS and LASTCLIP.TXT from each P2 card into separate folders - and made 3 backups :)

But I'm not sure how to save the shot that spanned the 2 cards?

It's my first time dealing with a spanned P2 card shot.

Thanks for any help!