Audio books / Podcasts?

I just purchased an older model of the Sansa CLIP + (The one with the square pad, not the oval or rectangular ones since I hear they have a few bugs)

So far in using it, I can’t seem to listen to an audio book, go to music, then go back to the audio book later at the same place I left off at. I end up having to fast forward into the chapter to get to where I left off.

I can’t figure out how to create the “Audio Book” or “Podcast” folder when the Sansa is plugged into the computer, working through the Windows Media Player.

My mom says it’s possible, as she is able to but I can’t seem to figure it out. All my files are pretty much in MP3 format for ease of transfer to the device.

Any suggestions? Help is much appreciated!