I had the same problem in my '96 Accord Coupe. What I did, I cut off the back of the baskets that hold the stock speakers, you dont really need them. I had to cut two holes and zip ties the little boxes that are included with the speakers. Then, after creating some new scew holes, I was able to screw the speakers into the door. They worked for about 2 months, did the install last November, went to crank up my radio, hit the wrong button for super base, and killed the woofer, something to be aware of...

By the way, I installed 6.5 Infinity Kappas, cant remember the model number, but this may help you, PM me if you need more help...