if you dont want to mount images etc then you will have to wait until a crack is on GCW if there is a crack that is. A crack should come though because other games that are protected with safe disc 4 have cracks, so you will just have to wait and see.
if you want to try the image in deamon tools then you can find safe disc 4 hider here:
http://cdmediaworld.com/hardware/cdrom/cd_utils_8.shtml
Alan