I compiled the Narsil triple v1.3.c with this method from this thread
I think it does not accept the preprocessor and other configs files
I learned a lot last 2 days getting into Amtel a bit, so i tried to compile your 3*7135 version
Compiling the whole project gives me an error in Amtel 5 that some tool is missing
Opening the Narsil triple v1.3 solution I need a newer version of Amtel studio than my 5