The developer of SnapTap targets to offer iPhone user a better way to take pictures. With SnapTap, it lets you to snap photos easily by using the volume control buttons. As the author mentioned, you can finally take self-portrait pictures, just like using a digital camera. This app should also work with most camera applications.
  • Take photos easily by using the volume controls.
  • Finally take self-portrait pictures without figuring where to press.
SnapTap supports all models of iPhone running OS v3.0 to 3.1.2. Of course, it only works on jailbroken iPhone. You can download the app via Cydia for US$0.99 OR install the cracked .deb file as follow:

Note: There is no icon for this application, all you have to do is open your camera application and use the volume buttons to take pictures.
Alternate Ways To Install:
Ssh your iPhone. You may see instruction on how to install .deb file via SSH. And make a folder called AutoInstall in/var/root/Media/Cydia/ so you have /var/root/Media/Cydia/AutoInstall which is case sensitive and drop this debs file in the autoinstall folder, reboot and respring your iPhone.