Z matrix to cartesian coord.

 Hi All,
 I have a problem which is rather urgent.  I have internal coordinates for a
 number of highly symmetric molecules (symmetry Ih).
 I would like to have the cartesian coordinates of these Z-matrices to a
 rather big accuracy (10-15 digits after the komma), to exchange with other
 people whose programs only read cartesian coordinates.  Is there a
 possibility to obtain these cartesian coordinates to this larger accuracy
 with the Gaussian 92 program, in stead of the standard six digits after the
 komma the program yields ?
 Please mail all the answers to me as soon as possible, I will summarize for
 the net.
 Frank De Proft