You have to have jailbroken iPhone / iPad with installous installed.

Connect your PC to iphone using WinSCP and following this path:

/private/var/mobile/Documents/Installous/Downloads/

copy the Koi Pond 2.5.ipa file into installous download folder.

Exit WinSCP, turn on installous on your iPhone tap on downloads tab and install

Koi Pond 2.5.ipa

Or, you can install it with iTunes, but make sure you have appsync installed onto

your iPhone or iPad device