Hi again John, quite a few options , kind of depends on which program you prefer I like "paint.net" written by the some of the guys that wrote "paint" for MS, paint also works much the same way, both are free, you will probably have paint on your PC if it's a windows type.
load your pic in to Paint, do any alterations you might want then go to "File" then "Save as" and you will be presented with pic 1, note the preview file size just above the pictures top right corner, in this case 308 kb which would be fine but if it was to large slide the "Quality arrow along the slider until it gets to the size you require as in pic2 then give it a name and it's done
Ah you've fixed it, I'll send this though, might help others