Allthough i managed to fix it a few hours later in a similar way thanks for the response.
I was wondering...
During the boot procedure is anything working in 1440x900 or in 1024 or something ?
You have to change a kernel parameter [vga=xxx in /boot/grub/menu.lst] to change that resolution. However i can't find anywhere the code for the 1440 resolution. All documentation online gives up to 1280