This guide applies to the Dell Latitude D820 nVidia model. It's just a summarised set of instructions based on work previously done by others several years ago, especially this site's members and admins. None of this is my work. Everything works Out-Of-The-Box except for the Wireless, but you can purchase a compatible WiFi card and use that instead.
What you will need:
-8GB USB Drive
-Modified Extras pack that has the correct kexts for your D820
-Working Hackintosh or Apple machine in order to run myHack
-Download the Modified Extras pack (found down below) and extract it to your Desktop. You will use this as your Extras pack, do not use the one from the Offical OSXLatitude site.
-Next, follow the Instructions set forth on the EDP Documentation page and download myHack. Follow the instructions made for the Chameleon bootloader.
-Continue on with the already made instructions. Click Yes if you are prompted about the MBR Patch. You should now have created a Lion Installation Drive,
-However, myHack will not ask you if you want to use a Custom Extras pack as mentioned in the Documentation. You will have to manually install them after myHack has completed its thing.
To get your custom Extras to the USB:
-Open up myHack again and select 'Install Extras'
-It will then ask where you want to install the Extras to. Select your USB drive.
-Then select the Extras folder that's on your Desktop and myHack should do its thing.
-That's it, you know have a USB drive ready to go.
-Power on your D820 and go into the BIOS.
-Configure your BIOS to these settings.
-Insert your USB into your computer and and exit out of the BIOS.
-Press F12 to go into Boot Options and select your USB Device from the list.
-The USB should boot you into the Installation Screen after a minute or 2.
-Continue on with the pre-made instructions from this part of the Documentation.
-That should be it, you will reboot and find the OSX Lion works beautifully on the D820!!
D820 nVidia pack