Before power on the computer.
Connect only the one hard disk which you are going to install the MAC and remove all other HDDS.
Use sperate power cables for DVD Drive and HDD.
"If the installation Hangs that means your system hasn't enogh power that means you should use more powerfull SMPS."
Power on the System->Go to BIOS settings page (Normaly the Key is F2 /Del etc).
Edit BIOS Settings
Set SATA as AHCI Mode
Turnoff "Processor Power Management"
Enable XT and VT if available->save the BIOS settings and exit (F10 and Y)
Boot From The dvd Install Using The Instructions Given on Installer ......
Then Again Boot Using The Same dvd in The Boot Loader Select The Partition in Where You Installed "Lion"
After Booting From it Install The "ChameleonInstaller.pkg"
Users With Intel Processors Will Face No Trouble Lion Requires 64 bit Support but It Can Load 32 bit too (It is better use a system with 64 bit support)
I am Not Sure That AMD and ATOM Users can Able to Boot From it Any How Give it a Try.

Minimal Hardware requirement.

ATX cabinet with 1000 Watt Power supply (If not available use at least 600W and above)
Inter 64 bit processor with XT and VT support
Minimum 2 GB Ram 6 GB preferred
500 GB or greater HDD and DVD drive with faster read speed
Graphics Card with atleast 2 GB of RAM
Microsoft Keyboard + Mouse
LCD or LED Monitor with High resolution support