how do i change my app store from uk store to ireland store??

See > Change your iTunes Store country

Here > http://support.apple.com/kb/HT1311

Change iTunes Store Country on an iDevice

1. Tap Settings;

2. Tap iTunes & App Stores;

3. Tap View Apple ID;

4. Enter your user name and password;

5. Tap Country/Region;

6. Tap Change Country/Region;

7. Select the region where you will be located;

8. Tap Done.

Also, see How to Change Your iTunes Store Account Location | eHow.com.

Tap Settings > iTunes & App Stores > Apple ID: > View Apple ID > Country/Region, then change as desired.

This helped me change my friends app store settings. a big help!!! Thanks!! 🙂