Hopefully a 360 owner can help. I haven't touched 360 files in a long time. I assume you were looking at these instructions:
https://forums.operationsports.com/f...1&postcount=15
By "unpack" he probably means to extract the ROS/DAT file from the ZIP (or RAR) file first. There are different instructions here:
https://forums.operationsports.com/f...98&postcount=9