Hey, Eddy, I pretty much posted the whole method in the thread. I honestly don't quite remember why I started doing it, other than I was attempting to emulate being very small, and using the front of the diaper more than the crotch. At first, it was a bit uncomfortable, getting erections, I supposed as things sort of stretched themselves to accommodate the tuck, but, that only made me more aware of my situation, and I was fine with that.
The only thing I think you have to work up to is the initial first weeks... I'd do the tucking after getting out of the shower, when things were kind of moisture-sticky. Just push Willie in upon itself, then wear something snug to keep it there. Think i might've even used medical waterproof strips to help, but don't suggest it, as I got a UTI, if I recall.
Hope this helps. These days things always retract into position, but come out, when it's safe.
JB