Try this ( Compression/optimization = same thing ) :
http://www.pcanswers.co.uk/tutorial...eid=7953&subsectionid=781&subsubsectionid=743
Optimising JPEG Web images
1. While Paint Shop Pro 7 can save images directly in JPEG format, the default settings in the Save As dialog box leave a little to be desired in terms of options. For better results, select Export, JPEG Optimizer from the File menu.
2. When JPEG Optimizer opens, you'll see this dual-pane display, with your original image on the left and a preview of the compressed image on the right. Choose the compression value using the slider.. 35 works well with small file sizes.
3. Switch to the Format tab. This is where the JPEG encoding method is specified. Standard or baseline format JPEG images are displayed one chunk at a time as data is downloaded. Select Progressive for Web work, and the viewer sees a rough preview.
4. Once you're happy with the compression and format settings, switch to the Download Times tab. This shows the final size of your image before you save it and offers an idea of how long it should take to download at a range of modem speeds.
5. As an easy alternative to fiddling with options in the JPEG Optimizer dialog, you can click the Use Wizard button at any time to switch to the JPEG Wizard, which holds your hand right through the process by asking you a few simple questions.
6. Whether you use the Optimizer or the Wizard, saving the finished JPEG doesn't affect the original image you have loaded in Paint Shop Pro, so don't forget to save it in a lossless format, such as Paint Shop Pro's own PSP.
Mark