How to Erase GameBoy Advance Roms on the iPod Touch

Download 'iFile' from the Cydia marketplace. 
Open iFile and click on 'Mobile.' Select 'Media' and go into the section marked 'ROMs.'
Choose the emulator you want to delete ROMs from. Tap 'Edit' at the top right of the screen and delete every file of the ROM in question.
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How to Install IPA Files With iFile

Connect the iPod, iPad or iPhone to your home's network by clicking on the 'Settings' button. Click on the 'Wi-Fi' button, then select your home network from the list of networks that appears.
Open the iFile program on your device by clicking on the 'iFile' icon.
Open your SSH program and enter your device's IP address in the 'Address' field.
Type 'root' in the username field, then type 'alpine' in the password field.
Click 'Connect' on your SSH program to connect to the device.
Locate the IPA file on your computer, and drag the icon to the 'Applications' folder on the device to install it.
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