Cutting out doors

I have spent so much time trying to get these damn doors off my ITR and I'm still on the first one. What should I use to cut them out??????

This thread should help you:

http://www.automotiveforums.com/vbulletin/showthread.php?postid=563114#post563114

there are also different methods mentioned here in this thread that you may find helpfull

http://www.automotiveforums.com/vbulletin/showthread.php?threadid=101741&highlight=adding+a+working+hood

Thanks a lot guys.