The (newer) included sys.txt should handle all of these: linked_root_list="/sdcard2/iGO /sdcard/iGO /sdcard/sd/iGO /sdcard/external_sd/iGO /mnt/sdcard/iGO /mnt/sd/iGO /mnt/iGO /storage/iGO /mnt/sdcard/sd/iGO /mnt/sdcard/external_sd/iGO /mnt/exsdcard/iGO /mnt/sdcard/extStorages/SdCard/iGO /ext_card/iGO /mnt/ext_card/iGO /mnt/extSdCard"
Any other name for the {storage name} can be edited in (?). But that would be a very unique situation, I would think.
Android can be confusing as on my Samsung galaxy s2 the internal memory is called sdcard and the actual SD card is called external_sd, so when I refer to sdcard I'm not referring to a SD card.
Also weirdly if I rename the iGO folder to anything other than iGO or Primo, I get "Insert your iGO SD card", so I'm guessing (!) your internal memory may not be called sdcard?