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 Change the Refresh Rate on a MacBook Pro

Click on the Apple logo at the top left-hand corner of your MacBook screen.
Click 'System Preferences.'
Click on the icon marked 'Displays.'
Click on the box next to the option labeled 'Refresh Rate.'
Click on one of the available refresh rates in the drop-down list that appears. Close the System Preferences window when you finish.
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