Hi, 
  
I am trying last two weeks to install Lion on Dell Latitude D620 but I stuck on beginning always. During USB boot I just got a black screen. 
  
Configuration: 
D620 BIOS ver A08 (04/13/2007) 
CPU Core Duo T2400, 1.84GHz 
RAM 2GB DDR2 667MHz 
120GB HDD 
nVidia Quadro NVS 110M, 64MB, 1440x900 
  
Method: 
I have followed instruction from this site to make USB via myHack ver 3.1.2 and use installESD.dmg for LION, than replace EXTRA folder with EXTRA from file Dell_Latitude_D620-nvidia-lion.zip, and run myFix (FULL) after. 
  
You can see video of booting up here: 
 
  
Any idea what is wrong and how to boot up Lion? 
Thank you.