first get a sharp knife and slice the spine label where the 2 shell halves meet.(if necessary)
then turn the cassette over and remove the 6 screws with a philips screwdriver.
remove the empty spool and use a flat blade scewdriver to ease out the clip from one end.
get the loose clear leader tape of the other spool and put it into the clip gap on the empty spool. then clip in the retaining clip, get one side in first and you may have to press down on ithe protruding side with the screwdriver so it snaps back into position.
romko, January 2007