i'm working on it! ,,,
Ok ,,,, I appears that those files were crated with Open foundation and they are in schematic form .I tried to create a new project unde ISE 6.2 and is able to add the files to a project ,.But it won't read that old format
By usign E-estudio i was able to convert the Edif 2.0 into VHDL code .
But the thing is that the original design was done with schematics instead of a high level language .. then it means that xilinx hardware primitives were used so .is not the best form of code .. Because the Vhdl code i produced reflects those primitives is basically a NETLIST ..
I also produced an Orcad schematic .. I think that is too envolving to put it to work with another architecture . And also WE DON'T know if this thing WORKS
Did my best