Yup, just peel the old vinyl off and clean the old door cards up(repair if needed) then using spray adhesive , spray the cards and fit the thin layer of foam to the cards, cut out the holes etc.
Now using the old vinyl (if still the right shape) use it as a template on the new vinyl. Cut it out making sure you leave a bit of excess (this can be cut of later) so that your garranteed you have enough.I used the missuses sewing machine (SSSSHHH don't tell her, LOL) to sew a bit of vinnyl in black around some black speaker carpet then sewed this to the bottom of the trim. Now spray the cards again with spray adhesive and place the new vinyl onto the cards making sure you have evenly distributed the weight and it sticks properly (i used a special stamp that my mates dad gave me to stamp the pattern lines in at this stage) once adhesive has set i used a staple gun to run around the edges to hold it all nice, pulling it irm at the same time.
Now just cut your holes out leaving a bit of extra to fold under and glue this down for a nice hole finish. Refit the crome stip and Fwalllaaaaaa Done, fit them in the car and go AAAAAWWWWWWW!!!!
LOL