PMac4400 with G3 upgradecard

[Mikko Västi]

Hi, My problem is that when I try to install mandrake(using bootx to boot)
everything else installs just fine, but then it tries to install
bootstrap( a part of yaboot?) and it fails to do it. It didn't even give a
hint what was the problem(no error explanation(or even error type)). So
any hints how to proceed?
Yours. Mikko Västi