What you need:
-a machine with 10.6(or better)
-a USB stick 8gb+
-a dmg from 10.8(you can buy it to be legal from apple store i will not write here how you can find it illegal!)
-Hackintosh Tool v2(all links are down so you can find it here!)
https://www.dropbox.com/s/pg2n6qbwh3k4rye/%20hackintosh-v2.pkg-Kexts to make all hardware works!
-a LOT of time!!!
here are the kexts:
https://www.dropbox.com/sh/vf55b73t16q3seo/1JBEZ-b1PYprogram to install the kexts:
for graphics card i dont know how to help you
i have nVidia Quadro 2000 and i make it works with EFISTUDIO add strings to chameleon and thats all
so! lets start!
open disk utility on your 10.6+ mac machine and restore the mountain lion dmg on the USB(if you getting error go to partition,choose partition1 and change the partition table to GUID)
when the restore finished,open the hackintosh toolv2 and install it on your usb drive
now plug the usb on your dell and boot
(if you have previous install with mbr partition table you can update it but i will not describe it how right now maybe some other day )
setup mountain lion blah-blah
when the setup finished install the kexts via the program
you can do all updates
i will write tommorow how to fix icloud problems/bootloader problems and maybe i will add pictures on the guide)