Hi sorry I overlook your answers,
There is no way to directly change the path in the RenderQueue to do so, you have to edit the document.
So before adding a document, you need to load them, then define the path in the render setting and then resave the file.
Here a quick example.
import c4d
# Load the document
docPath = r"PATHtoc4dFile.c4d"
doc = c4d.documents.LoadDocument(docPath, c4d.SCENEFILTER_OBJECTS | c4d.SCENEFILTER_MATERIALS, None)
# Retrieves the active render setting
renderData = doc.GetActiveRenderData()
# Set the new path for the picture
renderData[c4d.RDATA_PATH] = r"MyPicturePath.exr"
# Save the document
c4d.documents.SaveDocument(doc, docPath, c4d.SAVEDOCUMENTFLAGS_DONTADDTORECENTLIST, c4d.FORMAT_C4DEXPORT)
Cheers,
Maxime.