bill - 12:57 am on Oct 17, 2008 (gmt 0)

That's the way batch files work. They wait for the first command to be completed before moving on to the next. Perhaps a bat file to execute other batch files would be quicker?

I haven't tried this, but would something like this work?

Batch file #1 slideshow1.bat slideshow2.bat slideshow3.bat

Then each of the slideshow(1-3).bat files would contain a single slideshow execution. It might not be simultaneous, but it might execute faster than one single file.