If you look, what it's detected is your optical drive. It's connected to the only IDE connector on the board.
You can disable the JMicron controller, but guess what the results would be.
Your only option would be to move to a SATA optical drive. There are few available, and they are still pricey.
I have two opticals in my P5B system and it still hangs. Why? Because the external SATA port is controlled by the JMicron. It's looking for a drive connected to it. In my case is there is none.
There is an option in the Main BIOS screen where you can set the IDE timeout. You may want to play with that, but I saw no change on my system.