'SPS' denotes switching (layer 2) code and 'SPR' denotes routing (layer 3) code. You can actually accomplish what you are trying to do through the CLI. You can issue:
copy flash flash secondary
The above will copy the primary image to secondary.
You would indeed use that UFI image. That file contains the OS image (SPS08091.bin), boot code, POE firmware, etc. all in one bundle. Once it unpacks itself after copy, you would see the image name you are expecting. I would go ahead with the above command, however, as it will save you the hassle.
Ben Beck, RCNA, RCNI, Principal Technical Support Engineer