ACDsee classic is merely a file viewer, it's not a batch resizer.

The best program I've seen for controlling the filesize/quality of JPEG images is "Ulead Smart Saver", it can work as a PaintShop Pro plugin quite nicely. Although it doesn't do resizing, you could do some kind of batch-resize operation in PaintShop and then group-process the photos with SmartSaver.

I wonder if the old Graphics Workshop guy is still making apps. Back in the day, it was the cool program for batch resizing. I'll go google.

Edit: Here he is: Alchemy Mindworks.