Reduce capacity of Setup file

I created setup file by setup project. I attached with mdf, ldf files in it , SO CAPACITY OF IT AFTER PACKING IS QUITE BIG.
I want to reduce its capacity. How can i do that ?
I see some other Setup projects which have attached with mdf ,ldf files but It is not big as SetUp file of me. :confused:

Perhaps the other setup projects just have smaller database files inside? How much data is in your mdf/ldf database files?

65 M for my Setup file.

This is other Setup Projects :

http://picshome.com/en/download.php?id=580997551

Capacity of that Setup file is 412 K while mine is 65 M