Create "Plugins To Compress" folder on your Desktop, than move the "SimCity_1" folder inside that. In the "SimCity_1" folder place "SimCity_1.dat" and "z_CAM_2.1.0_Stand_Permanent Merge.dat".
Than run the JDatPacker and set as Source Directory the "Plugins To Compress" folder, and as Target Directory your Desktop. You will find a file named "SimCity_1_000.dat" on your Desktop, rename it as "SimCity_1.dat" and move it inside the "GameData".
I sent an attachment that could help you

("Scrivania" mean "Desktop" in Italian).