pre-heat oven to 350F
Mix together cookie crumbs, sugar, and salt if using
Melt butter in microwave
Drizzle butter into sugar/cookie mixture in thirds, mixing with a spatula in between additions. Don't add the butter all at once--it will clump up in the cookie/sugar mixture and you won't be able to properly mix it in.
Dump the mix of butter, cookie crumbs, and sugar into a 10 inch pie pan. use your fingers to press it down and start to force it up the sides of the pan.
Use a flat-bottomed measuring cup to press the crust into the plate and form up the sides. I used a 1/2C measuring cup, but a small glass would work fine, too. You just need something with a flat bottom that you can use to push the crust into the plate--especially the crust on the sides.
Bake for 5-10 minutes to set the crust. Five minutes is the minimum; the longer times give you a progressively crispy crust. For this dessert, I baked mine for seven minutes, which seemed to be about right.
Cool to at least room temperature before assembling the pie. If it will be more than an hour before you use it, cover it with plastic wrap and refrigerate.