Don't use SGSUnpack to extract the ANM files from SGS.DAT. Open the SGS.DAT file directly in Grapholic.
In Grapholic, right click on the SGS.DAT file and either Change Graphic Type to sognadat or use the Check Graphic option to have Grapholic do it on its own. Then when you open the SGS.DAT file, it will decompress all the ANM, PCM, WIN, etc. to an AppData\Local\Temp folder. You can then open the ANM files individually (except for the large maps used in games like GTB and RSR)