I didn't want to reinclude the RC script in this project because this was about reusing an already compiled .lib file. And since it needs its associated resource to work, I have to link the RES file.
Well I could have added the binary as a linker option, and maybe I was supposed to. The thing is: I have never done this in C::B before, and since C::B would let me add it to the project (and it even managed compile exclusion correctly), I thought this was a normal way to do it. But I can change it without problem if it is not.
However, I isn't it still an error to add the "post-compile" subfolders to something that has not been compiled in the project? Also, the project can know this, since the file is not a known source file type and it is unchecked for compile.