I constructed a 3 minute audio/video project and once finished, noticed that all the files were on my C Drive. How can I migrate all the paths to my D drive so that the project will 'see' the files.

Any dissolves (crossfades) I do result in extreme gapping. I'm hoping this is because the files are on the C drive. Even the audio gaps when capturing.

does anyone have any hits for computer speed optimization?
I'm using an Athlon 1.3 gig with 512 mg RAM.
thanks in advance...
Michael