[expert] Upgrading from Slackware 7.0 to Mandrake

[Steve W. Powell]

Is there a HOW-TO or any other documentation for upgrading from one
distribution to another? Specifically Slackware 7.0 
to Mandrake. 

I have a very well established Slackware system at work, but would
rather use Mandrake after installing and using it at home, 
but don't want to lose all the information and programs on my root
partition. 

Thanks

-- 
Steve Powell