I have Mandrake 10 on a hard drive but haven't used it in a while. Someone like me wouldn't have clue on how to install such a KDE update. I always had a hard time installing on Linux. It's vastly easier for Windows, a no brainer.
Dennis,
There is an easy way and a hard way. Given Mandrake uses RPM's soon they should have a 3.5 update that you just use their installer (I dont know what they use) to put on. For example on Fedora (what I use) if I wanted to install KDE3.5 I could use gymu (a graphical tool which connects to a yum repository) and just hit the install button..