OK, I want to take time out of my day to give you karma for this. It completely solved my issue.
I was trying to install 5.0 beta 2 on an x86 platform.
Dell Optiplex 780 (latest BIOS firmware (A03))
Core2 Proc
1GB DDR3
SATA to CF adapter (256mb card)
integrated gigabit network card
SATA controller set to ATA mode
I was able to use Netinstall 4.9 on my desktop PC to install the package to the CF card which I then put in the Optiplex 780. It would boot off the CF, install ROS, and load ROS 4.9 successfully all the way to the command prompt. However 4.x does not have the gigabit NIC drivers for my motherboard NIC.
So I downloaded the Netinstall v5 and attempted to install ROS 5.0 beta 2 using the same procedure. The installation to the CF card went fine but when I put the card into the Optiplex 780 only the Linux loader part would load but it would freeze just as Chupaka described above.
I tried everything to resolve this. I reformatted the card. Attempted to install every package to the CF card. Changed the SATA mode to ACHI (did not boot) and "Legacy" mode (booted but same problem prevailed.) I tweeked every possible setting in the BIOS but the same issue with initial booting to install ROS 5.
So I came here and found THG's ISO. I downloaded it, burned it to a CD, booted it on the Optiplex 780 and used it to prepare my CF card. From this point the CF card booted and finished the ROS 5.0 beta 2 installation process. The system then rebooted successfully to the login prompt. 5.0 beta 2 has the correct drivers for my NIC and I was able to use Winbox on my desktop computer to connect to the Optiplex system and configure ROS.
So based on this information I would say it may be worth investigating further a potential bug/problem with ROS 5.0 and x86 platform.
Thanks, THG.