This is my first question here and I'm not sure if this is the appropriate site for my question, but here it goes. If this is not the correct site, please direct me to the correct one.

I have a psd file. I simply want to extract the layers from it into separate image files. I do not have Photoshop and I've already used up the free Photoshop trial.

I am running Mountain Lion on a MacBook Pro. I have installed Gimp, but I can't figure out how to do what I want. I have searched using Google, but have been completely unable to find a tutorial showing me how to do this.

I would really appreciate instructions or a link to an appropriate tutorial. I have seen some answers here, but they simply say use Gimp, which doesn't help me.