There isn't really a recipe to making a picture work on a website. But basically you wan't to keep it as close to the original in terms of appearance as possible but reduce it size as much as you can. You do this by reducing the number of colors, by increasing compression, By changing the types of pallettes used withing the image etc.. The Import Export feature in PainShop allows you to tinker with these settings. Play Around with it until you get something you like.