Well, it wouldn't be such a bad idea, it's just that too many forums wouldn't be really handy, and i don't really think lots of people would post on it (as customize knoppix is already used for most modification posts)

Every person that remastered knoppix used the said howto, and imho people can easily use the wiki or make their own site if they want to explain how they did it, instead of having it somewhere in a forumpost. Adding to the howto might bring more useful information. But again, this is my humble opinion, i dont know if more people would find it useful

But i must agree with your underlying problem: having a dialup isn't ideal when people are posting iso's everywhere. Havn't got a solution for that, sorry