I'm working on a Dual 2GHz PowerPC G5 running Leopard 10.5.8.
and 2.5GB SDRAM

When working with InDesign, Photoshop and Illustrator CS3, I keep getting the problem of InDesign popping to the front when I'm trying to work on either of the other 2 apps. It's like it wants to steal the limelight and doesn't want any other app to run, it just keeps coming to the front so I can't work on other app's files. I'm also getting the problem of the dreaded colored wheel when working on some InDesign files and it takes anything up to 10 seconds to perform a command, even just selecting a tool...very frustrating, but not on all work and not always complicated files either although some so have imported Illustrator graphics in them.

Any ideas (on either problem)?