Micrologix 1100 - swap words in LONG

Hello,
I need to find best in terms of performance solution for my problem:
I use MLX 1100 with modbus communication and i get 2 words data to my B20 where B20:8 contain high word and B20:9 low word.
When i CPW B20:8 (length 2 ) to LONG i get B20:8 as low word and B20:9 as high word. Because i have a lot more data like this i want to avoid using aditional B file as buffer with swap words. Is there any other way to do this?

anyone?

I think the lack of responses means no, there isn't a better way with RSLogix 500. There's really nothing wrong with your buffer idea; just make a subroutine that swaps each set of words and stores them in a second data file. Then use CPW on the buffer file to populate your Long registers.