First you need to Jailbreak your IDevice and i have videos on the latest jailbreaks on my Channel Software Reborn.
After you jailbreak your device, go into Cydia and go to manage and then Sources. In the sources click Edit and then Add and a box with http:// will pop up. In that space type the following: http://sinfuliphonerepo.com and hit add and then ok.
Once you've done that, go to the search section of Cydia and search Pandora Downloader. Click on it and click install and then confirm. After it installs go ahead and open up Pandora Radio but before you do that Respring your Device.
You'll notice that there are no Ads in between the three or four songs that you've skipped. There is also an option in between the thumbs up and down that allows you to save the song and play it again later as well.