I don't seem to know how to get at 800. when i size them at 800 in photoshop, the picture is too large. it comes in at over 440kb. So i just backed into the kbs. until i got near the 146kb limit.
Please see my short tutorial on resizing images for BPN in the Digital Workflow Forum. It's a Sticky at the top.
Image looks very promising at the size, but it's really difficult to judge the quality and sharpness when it's so little.
if you need further help, pleases feel free to send me a PM