I am using the same program you are on your advice. Fireworks!
What I am saying is that compressing them saves load time. My side and corner graphics are 41K instead of 80-150k like the ones in your file. I am just saying that if you compress what you have then people will save time loading them. Alot of time people like you and I forget there are still people on dialup access. Thats why I try and compress things as much as possible. I doubt you can compress my topleft.jpg any more than I could. Your welcome to try but Photo Quality images only compress so far without losing quality.
What you did here is great. It saves file size a bit and anything saved is just that much better. You are becoming quite the template wizard.