SeattleTom
Hi Fran - It was good to get your reply. I've never done a salt load, and know nothing about them. If he's open to the idea of taking a colon-cleansing supplement, Perfect Seven worked very well for me years ago. Others on curezone can probably recommend others that might work as well or better.
If he's willing to do some reading, I recommend "The Detox Book" by Bruce Fife, ND. This might give him some context for understanding why colonics, enemas, etc. would be a good idea for him.
Tom