Rez, I currently use Photoshop 7, Corel Photopaint 10 and dabble a little in PSP 7.
Process all images in PS7 and then flit between the others to get things right. I find that sharpening is better in other programs.
Oh, and I downloaded the update for PS7 but it could not load. Not sure what the problem is. To be honest, if it ain't broke, don't fix it