Here is the guide to install it and more:
1º) Install using apt (piece of cake): $sudo apt-get install mp3blaster
2º)Configure it: here you are gonna have problem, because to create a playlist you must use f1 that's the help key for X. so you must rename the keys with:
sudo nano /usr/share/doc/mp3blaster/example/sample.mp3blasterrc
Once there look for #Key.SelectFiles = 1 and change that 1 for any key you like, also you should look for another "1" in the document, because there is another function that also needs f1 to work, so you must change it also.
3º) That's all use it so you get used to it, but once you know the keys, it's great.
For more info look in http://www.linux.com/articles/53095