Long ago I used Streambox Ripper to convert Real Audio/Real Media to MP3. Unlike other converters the program was very stable.

Converting Real Audio/Real Video files with Streambox Ripper

• Launch Streambox Ripper
• Click Load and select your .ra or .rm file
• Hit the Convert button.
• The options window will appear, where you can select to copy to MP3 or WAV, whether to use an equalizer, etc. I used to convert to MP3 files without using the equalizer.
• Hit the OK when you're done.

If you have any problems with .dll libraries, please read the text file in the StreamboxRipper folder.

I'm not sure whether StreamboxRipper works with Real Alternative or not. Even the latest versions of Real Player may need some manipulations with dll files to make it work.

Adding MP3 files to iTunes
Select your MP3 files and drag and drop them into iTunes. Change the ID3 tags if needed.