I used to use an app in the market but I forget what it was called. There is one called Rom Buddy 2 if you wanna try that one out, it costs like .99 so up to you. The other option you got is just use your computer and got to Coolroms.com or romnation.com and download them to your computer, then transfer them to a folder on your sdcard. They are small files so it's not like it will take long to do either. If I remember that name of the app I used I will let you know.