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NDSolve with (compiled) numerical functions

Dear Newsgroup

Is it possible to solve (ordinary, first order, coupled) Differential
equations numericaly with NDSolve, if the "right hand side" of the
equation is given as a numerical, compiled function? To be concrete,
my equations have the form

x'[t] == beta_x[ t, x[t], y[t], z[t], ...]
y'[t] == beta_y[ t, x[t], y[t], z[t], ...]
z'[t] == beta_z[ t, x[t], y[t], z[t], ...]

The functions beta_x, beta_y etc. are very complicated objects. I
would like to compile them in advance or perhaps use mathlink to
evaluate them externally.

Best regards

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