How do I go about transferring Rick's MP3 files to my iphone?
The easiest way is to subscribe to the podcasts through iTunes. The next time you are in iTunes, go to the iTunes Store, type "Rick Steves" into the search engine, and then choose either his podcasts or his audio tours. You can then select just the ones you want, or you can take them all. The files will automatically upload when you sync the phone to your computer. You can also set up iTunes to download any future Rick Steves podcasts.
We just download them from the website, clicked and dragged into iTunes and updated the iPhone like usual. Are you having a specific problem getting the files into iTunes or from iTunes to the iPhone?