STEP 1:
Click on Cydia.

STEP 2:
Select "Manage" from Cydia.
STEP 3:
Press the "Sources" button.
STEP 4:
Press the "Edit" button.
STEP 5:
Press the "Add" button.
STEP 6:
Type "http://cydia.tedhung.com" in the dialog box.
STEP 7:
Wait for the repository to download and select "Return to Cydia" once it is done installing.
STEP 8:
Select "Ted's Repository" from the list of Sources.
STEP 9:
Select "Hatan Engineering" from the repository.
STEP 10:
Press the "Install" button.
STEP 11:
Press the "Confirm" button to add the app to Installous.
STEP 12:
Press "Return to Cydia" once the install is finished.
STEP 13:
Click on "Installous".
STEP 14:
Click on "Downloads".
STEP 15:
Select "Hatan_Engineering.ipa".
STEP 16:
Press the "Install" button.
STEP 17:
Wait for Installous to say that the app is installed.
STEP 18:
Exit Installous and check that the "Hatan Engineering" app is installed!