I hope you got a real good deal, cuzz your screwed. There is nothing to resist the outward movement of the walls when the roof load pushes down. You really need to start from scratch and design proper rafter ties, collar ties, and spans back into the structure. The truss is now useless since some dumb azz cut the bottom chord.
The best fix is to get an engineer to design a proper fix, that will probably be cheaper in the long run too. You can throw lumber at this all day and still have problems if you don't know where to put it.
Knowledge ain't cheap, but it is nowhere near as expensive as ignorance.

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Jim Luttrall
Mr. Inspector.net, Inc.
Allen, Texas 75002