cheat code

[malaire]

2) when i boot from cd and i have my hdd indide where hda1 is ext3 and hda2 is swap, knoppix uses the hda2 for his own swap so i am not able to format it then ( the cheatcode noswap did not help me in this case)

You can use "sudo swapoff -a" from console to stop using swap. After that you can format it.

3) when i am using bootfrom=/dev/hda2/4_0_2dvd.iso then the hda2 is write protected and i have no way to write some file on it. It makes sence, but is there a way how to remount it to rw ?

Right-click "Hard Disk [hdb2]" icon on Desktop and select Actions->"Change read/write mode".
You can also use "sudo mount -o remount,rw /dev/hdb2" from console to remount it to rw.