If your class has a default constructor (or basically your constructor can handle the 0-argument case) then the simplest way to pre-allocate an array of 1000 objects is just to type:
myArray(1,1000) = MyClass;
You say "1000 copies of a fully populated object" though which suggests it isn't infact pre-allocation you are doing, but full array allocation already initialised objects. In that case you can't do what I suggested.
