Hi,
Trying to find this out myself. You need to do it in steps though, as noone gives you all the answers.
Check out the LFS hints though, there may be some good stuff there.
Especially:
Guide to creating your own live CD
Installing RPM (or other package managers)
Maybe try and apply this HOWTO for
customising the Anaconda installer to your distro. Probably need some programming experience here or know someone who does. I don't so might take me a while.
I'm not quite sure what's involved, but the best bet (if you want others to adopt your distro) is to work on a binary install as it cuts the install time to less than an hour and is much easier for the IT-Phobic. For a basic system, maybe 5 mins.