The molden4.7 version is compiled under MacOSX leopard on intel processor,
with the g77 compiler of the Fink distribution. You may be missing the 
shared object libraries required to run the executables. 
The executables are:

molden4.7.macosX   (standard Xwindows version)
gmolden4.7.macosX  (opengl version)
ambfor             (the auxiliary amber/gaff force field program)
surf               (auxiliary program to create solvent accessible protein
                    surfaces).