erratic ideling

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A few hits including this from blkdiablo33 :
"1124 long term fuel trim addaptive air system too lean."

Too lean means too much air not enough fuel. I would check for obvious issues like a disconnected EVAP or other hoses. After a physical examination you could have a shop do a smoke test on your intake and/or evap system and look for leaks.

I would also check the other issues that could cause the rough idle and could trigger the 1124 as a side effect:
1. Intake gaskets (aka manifold gasket) failing. This is the gasket between the intake runners that connect your red intake to the head of the engine, and they are at the base of the engine. You can hear or sometimes spot the leak by looking for black stuff around only one intake runner. If you need a pic, let me know.
2. Clean your MAFs. Do you have aftermarket and thus oiled air filters?
3. Make sure the intake plumbing clamps are secure. Seems to be a weak pot on a few 360s. This is a clamp that keeps the piping between the air filters and the red-heads sealed. This is a physical exam or smoke test.
4. Be careful driving on a lean engine, could possibly cause engine damage of its lean at high load. At idle you are on the safe side, so if its an evap type leak, with small volume, you are probably fine to drive it. Just caution on the safe side.

Also an excerpt from:Ferrari_tech : http://ferrarichat.com/forum/showthread.php?t=24028&highlight=P1124
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"P1124 Long Term Fuel Trim Additive Air System Too Lean (Max)
1.Check fuel pressure
2.Check HC CO emission with no lambda
interogator
3.Check injector and wiring
4.Check ignition coil and wiring
5.Check exhaust system leakage"

Good luck and make sure you post here any progress you might have!