I've read the manuals for SID 3.1, AID 5.11 and AID 4.4 (the version I use) from start to finish when I first started this stuff. I'll admit too to being somewhat mystified by the 06 and 67 softmod settings reference. Rings no bells with me either and I've used SID/AID on 5 different Xboxes.
I even downloaded the full SID 3.1 and AID 4.4 PDF manuals last night and had a very quick scroll through and couldn't see anything referring to numbered softmod settings. Also Googled and the only thing that came up was this current thread.
You can have no doubt that whatever information Heimdall
is talking about is somewhere in there but we unworthy souls
obviously need a little more direction.