carpet install...any tips?

I installed molded carpet in both my Duster and Dart without glue, worked out great. As others have said, laying carpet out in the sun helps, I forgot to mention that. I went the extra mile after installing the carpet by putting some heavy landscaping cinder type blocks on the floor after the carpet install to help the fit--I did this on the rear section where the floor pan has two buckets between the hump; and also before I installed the front section. I did this in April, the afternoon sun really helped. I had my Dad helping, install went a lot quicker that way.