you can edit the _buildscript.py python script to automatically name them ".bin", just edit
Code:
import os,sys
execfile("AppData.txt")
icn=open("icon.icn","wb")
bnr=open("banner.bnr","wb")
to
Code:
import os,sys
execfile("AppData.txt")
icn=open("icon.bin","wb")
bnr=open("banner.bin","wb")
or you can edit the build script to load the .bnr and .icn, either way works and saves any manual renaming