R help - Dec 2005 - Sorting vectors according to a desired correlation coef

Dear all
First time posting in this list. This is my question: I have three
vectors (x, y, z) containing random numbers from three different
distributions (normal, random, exponential). I want to sort the vectors
so the pairwise correlation coefficient between them is 0.5. How can I
do this. I can't use mvrnorm because I'm using different distributions.
Any help will be greatly appreciated.
Carlos

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