I am partnering with another editor and am not familiar with Final Cut Pro 7. We use one 20 minute low res clip for our project. We set up a sequence that matched the video - cut it up as our new project. Now we want to replace that 20 minute low res original clip with our high res 20 minute clip (identical content). We are having trouble trying to figure this out. We tried to disconnect the media and reconnect it with our new one and that worked fine. The problem is that the sequence does not match the new high res video. Our new footage is 1280 x 1080. Any suggestions?