Rule #1 - Be Patient - Rule #2 - Don't ask when, if you don't contribute - Rule #3 - You have coding skills - LinuxMCE's small brother is available: http://www.agocontrol.com
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You then need to affix the emitter nubs to each of your AV devices you wish to control.
And then make device templates for them in the web admin. The device templates tell LinuxMCE about your devices, and in the case of AV equipment it describes the commands the device can handle, as well as any inputs it may have or provide. Your TV has inputs for HDMI 1/2/3, and/or Component, etc.. This will allow LinuxMCE to understand what you have.
Once you make device templates, you can then use the setup wizard to select your AV devices, and tell LinuxMCE how they are connected together, in which input ports etc. LinuxMCE will use this information to send IR pulses to the relevant gear to switch inputs, etc.