i have the installation log if you want, but it is like 4200lines.... and part of it is in french because i am french and installed it in french ^^
here is the log :
http://www.tout57.fr/leo/log

-f -x want help me neither

edit : the log file was without .txt extension, sorry

i reinstall leopard
this time without chipset driver
then i copy the last AppleNForce now it detect my harddrive, but it freeze (without error message or kernel panic) 3 lines after...
I will try other things and make other pictures

i tried "-v -s -f cpus=1" and i get a console

i typed exit (because it says type exit to boot normaly) but it freeze too

i made an other picture (poor quality sorry) http://www.tout57.fr/leo/test.jpg

we can see now it find my hardrive (get boot device ... BSD root)
then start jnl HFS and after about 40 second it freeze (i know it because i clicked on the CAPS lock and after 40 seconds the led don't change )

any idea ?

i restart with -f and -s option to boot with a terminal

i tried the first command (fsck -fy) it worked
i then tried the second (mount -uw / ) to have write acces and ... it freeze
i really don't understand .... the DVD had write acces to my drive, why not me ?!?