Great job!!
I did the same using bitumen strips before adding the Insulflex foam.
Please allow me to share your thread, since it's the same topic, no need to start a new one :D Just posting pictures since detailed (awesome) guides are shared by cvkit17.
Here's the Door
http://forum.lancerzone.com/gallery/albums/userpics/10800/DoorDeathening3.jpg
Door panels, along with original sound damping material
http://forum.lancerzone.com/gallery/albums/userpics/10800/DoorDeatheningDF.JPG
Boot wall with strip
http://forum.lancerzone.com/gallery/albums/userpics/10800/BootDamp10.jpg
Boot wall with Insulflex on the strip
http://forum.lancerzone.com/gallery/albums/userpics/10800/BootDamp14.jpg
Boot floor
http://forum.lancerzone.com/gallery/albums/userpics/10800/BootDamp017.jpg
A, B Pillars
http://forum.lancerzone.com/gallery/albums/userpics/10800/PillarSoundDamp07.jpg
Middle Seat belt pillars
http://forum.lancerzone.com/gallery/albums/userpics/10800/PillarSoundDamp11.jpg