Batch Command in PS

I have a large number of bitmap files that I wan't to convert to JPEG's. I can recall someone recently posting instructions on how to do this in Photoshop using the Batch Command. I'm not sure if it was this journal, but if someone could point me in the direction of this post I'd be greatful. I have looked through all the posts and memories and I can't find it. Thankyou.

Edited to add: I worked it out! Just freed up 800Mb of disk space in about an hour.