Where can I find the missing MediaPlayer.Framework and MessageUI.framework frameworks?

I'm attempting to ad AdMob to an iPhone app as a backup for iAd, unfortunately, I can't follow the documentation. It's telling me to add the 'MediaPlayer' and 'MessageUI' frameworks, but they don't appear to be present -- I can add a number of other frameworks, but those two are AWOL.

Please note that I can add any number of other frameworks; my problem isn't adding frameworks in general, but those two specific frameworks ar开发者_运维技巧e AWOL. They can be added to other projects, just not this one.

How do I correct this?

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Right click on the Frameworks folder, choose Add -> Existing Frameworks... then select the ones you want to add.