IOS – install downloaded app even if it’s not available on the App Store

If you were running Windows 7 before the reinstall, look for the following folders:

\username\My Music\iTunes\Mobile Applications
\username\My Music\iTunes\iTunes Music\Mobile Applications

If you were running Windows Vista before the reinstall, you should look for:

\username\Music\iTunes\Mobile Applications
\username\Music\iTunes\iTunes Music\Mobile Applications

If you were running Windows XP before reinstalling, look for:

\Documents and Settings\username\My Documents\My Music\iTunes\Mobile Applications
\Documents and Settings\username\My Documents\My Music\iTunes\iTunes Music\Mobile Applications

These are the default locations for your apps. If you had changed the location of your iTunes folder in your iTunes preferences, you could search your backup copy for a folder called "Mobile Applications" or for the app's name.

A common way to work around the cross-border restrictions of the iTunes store is by using pre-paid iTunes cards. These are often available on eBay and you can redeem them in the iTunes store for the country of origin (assuming you want US items, you need to buy a pre-paid card from the US.)