Once you have your picture up in Paint Shop Pro, click on "image" in your menu bar, drop down to "resize" or you can just hit "shift + s" which will also bring up the resize screen. Lower the number of the width to 800 or if your picture was taken vertical, lower the height to 800. Click on "File" then "Save As". Once you saved your picture open the folder its in and hold your mouse over the image, a small screen will pop up, check the size to see if its 100kb or less. If its not then go back to Paint Shop Pro and adjust from 800 down to 750 or lower until it reaches 100kb. Always make sure you make a copy of the original before doing any resizing. I know this sounds kinda complicated and theres probably a easier way of doing it and maybe someone else has a simplier way with Paint Shop Pro. Hope this helps.