I always had the same problem burning .ios too, until I figured out a trick, it works for me 100 percent so far! Double click on the .cue file that is included, it should ask you what program to open it with, choose notepad. it will tell you some info on the .iso file, like how it was set up. Here is the cue file from Norton system works 2002.
FILE "NSW2002ET4.BIN" BINARY
TRACK 01 MODE1/2352
INDEX 01 00:00:00
I use nero too, it tells you that you need to set nero to 2352 block size, there is only two choices for this setting, but it fixed all my problems! It will automatically choose the raw button if needed. Now I have no idea what all this means, but it works for me, hope this helps! make sure you choose the .bin file to burn, you don't need to include the .cue file. Bin is the biggest file,lol.