I used that firmware on my old NEC1100 - it worked fine, I seem to remember that drive did not support bitsetting, come to that I don't think the new ND4550 does either !
However I removed that drive before Xmas to make way for the new ND4550 Liggy & Dee may have FW for the 1100 as well....
The .mds file is small, as Shamus said tho its good to get into the habit of selecting that to burn tho - ImgBurn will pick up the iso if you select the .mds, you don't need to select anything else
I used to use loads of Ritek G04's and G05's but late last year the full face printable G05's went bad...... In two spindles of 50 I had approx 20 bad burns in each. Luckily my supplier kindly sent replacement TYG02's and I have never gone back. Prior to the last 2x spindles of Riteks being poor I had experienced maybe 5-6 per 50 failing to burn....