I did some testing today and...
Yes, I could set user name and password. Even I updated the software. However, soon after, I would boot into a black screen on the lap top.
When you use F4=Failsave at the boot (GRUB) screen, is Pardus then started with a reduced screen resolution
And does it also goes black then
As for the PC,...
Here the options are very limited.
When the F4=Failsave doesn't do the trick, the only option I can think of is a Bug report at Bugzilla
Maybe they (the creators of the iso) have an additional option in the background