File Method:
1) If you don't have iFile already, you are going to have to open up cydia and add either
http://repo.beyouriphone.comhttp://sinfuliphonerepo.com to your cydia sources list.
2) Once you have added the source, click on it and scroll down and install iFile
3) Next SSH into your device and copy your deb file(s) to /private/var/root
How To SSH:
https://www.youtube.com/watch?v=fRfTDg3K17o4) Once you have copied your deb files into the /private/var/root folder, open up iFile and navigate to that directory
5) Once you are in /private/var/root in iFile, you will see your deb files listed. Click on the file, and then click on installer.
6) After it has installed, respring and enjoy!
AutoInstall Method:
1) You are going to need to SSH into your device (I use WinSCP)
2) Click on the media folder and create a new folder called Cydia and inside that create another called AutoInstall. /var/root/Media/Cydia/AutoInstall
3) drag the files over into the AutoInstall folder
4) Once you you have done that, reboot your device and then respring. The reboot then respring is key. It will not work if you do not reboot then respring. This way is a lot easier than going into terminal and running it that way.