Hello,
It sounds like you need to learn more about the basics of using FCE. Get a copy of Tom Wolsky's excellent book
"Final Cut Express 4 Editing Workshop and maybe also his
Final Cut Express Made Easy tutorial DVD.
The Capture Scratch folder is where FCE saves the video clips you capture from your camcorder. If you change the FCE scratch disk location, it creates a new Capture Scratch folder in the new location and starts saving your video clips there. Changing the scratch disk location in FCE does not move any of your existing clips from your old scratch disk location to the new one. So, since you seem to have changed the scratch disk location you probably have some clips in the old Capture Scratch folder and some in the new one.
Clips that have the name 'Untitledxx" are given that name by FCE when you do not specify a unique name in the Capture window at the time you capture the video from your camcorder. Look on the Capture tab in the Capture window. You will see boxes where you can type in your own Name for the clip; or you can have FCE automatically build a name if you fill in the boxes called Description, Scene, Shot and Angle. You should also, always, enter a unique Reel Name for each tape you capture from.