Creating CDE files

I was reading threough the help files looking for some information on creating S-LINK cde files. I was able to find a section on identifying the ID code, but since have had some trouble. First, I couldn't get the iterate step to work at all, I had do it manually. After I identified the ID code, I couldn't find any info for locating the commands or creating the device file. I went digging through some other cde files, but wasn't able to figure out much from them. Is there any documentation on this process? BTW, I'm trying to create a device file for a STR-DA50ES receiver; ampsls.cde and ampslr.cde don't seem to work other than for volume and mute.