I'm searching for a commercial AMT - tool to modify BIOS Settings from my DELL Optiplex 755 PCs. I don't want to use a complex Software Management Tool like Altiris. I only need a small Utility to modify BIOS Settings etc.
You could try Intel AMT Commander included in Intel AMT DTK for this. Under Remote Control tab, you can start an SOL session and boot into the Bios options of your AMT client.
You can also use IMRGUI in the Redirection sample included in the Intel AMT SDK. There is a video tutorial on this at http://softwarecommunity.intel.com/videos/home.aspx?fn=1455