i decieded to do boot in stall from wifes mazda 121 saloon
list of items needed
2 10" subs
1 150 watt amp
2 round sheets of clear plastic
frist thing i did was to make a template from card of the space i wanted the subs to go
then i copyed that onto the mdf and cut it out
also cuting the hole for the sub at the same time once this was done i test fitted the mdf to the car and fine tuned the mdf for a better fit.
useing the cut mdf i made two over size peices from the seating form and the leather and then started to stapel the leather to the mdf
remebering to cut the hole again for the sub.
once this done and your happy with it test fit again and if that ok fit the subs and amp and install
i am going to make a bottom board and reline the back off the seats ill post pics and what ive after ive it