From what I understand, a RIS install uses unattended.txt by default instead of winnt.sif
Nope
the name of it can be anything so long as it ends in .sif and resides in the templates folder inside i386 of the image. Its not quite like a CD install, which is why people need to use caution with RIS installs.
The base really should alter/create one of those... But it doesn't since it expects the install platform to be a disc.
If it made it and put it in the usual location of a CD install, it would serve no purpose as RIS doesnt take it's templates from there [as mentioned above] plus there are differences in a RIS template and a normal CD-based one.
Havent the time unfortunately to go into the details of RIS for you, but i appreciate your feedback etc.
Those files that get altered are in the I386 directory (get used during install), and I would think that they use relative paths to refer to the OEM directory for the drivers. So if you put the OEM directory side by side with I386, then it shouldn't have a problem... I only mentioned opening the files to look for absolute paths because an absolute path would definetly screw something up (but I seriously don't think that you have to worry about absolute paths).
I agree with you there, however, you are missing my point.
Unless you use RIS, you wont fully understand what I mean, not the layout as i believe DP fully supports RIS installs, being that a XP RIS install [using RVM/NLITE/B.T.S.] works perfectly. I use AutoImage for this and i dont have a problem here.
The XP build looks like this:
RISIMAGENAME\ > i386\
> $OEM$\ > $1\
and inside the $1 directory are the B.T.S. files and bin directory.
This may be down to how AutoImage uses DP_Base via API to add the drivers but I can't be 100%. All I know is it works for XP like this, but doesnt for the specific version of the OS I've mentioned. And even if i dont use Bâshrat the Sneaky at all, i still get the BSOD issue unless i work out a way to not use the $OEM$ directory you see.
The issue is fundementally confusing but i'll find a way somehow 
Any RIS users about please post... would help me out to know if i'm alone in this specific problem or not lol
Regards
Nath.