OSX won't boot anymore

[lefagroll]

I recently installed OS X Mountain Lion with MyHack on my Dell Latitude E6400.

Everything but the WiFi was working so when I installed the wifi kext with Kext Installer, it won't boot anymore.

 

When I boot with -v it hangs at [ PCI configuration begin ]

I've tried to delete the kext with terminal from the usb stick I installed from, but it didn't help.

 

When I boot normally the spinning wheel below the apple logo just stops.

 

Here's my computer specs:

CPU: INTEL CORE 2 DUO P8600

GPU: NVIDIA QUADRO NVS 160

WiFi: INTEL WIFI LINK 5300

Bluetooth: DELL WIRELESS 370 BLUETOOTH

Full specs: HERE (click on System Configuration in the blue menu in the middle)