The 1861 doesn't use an NM, NME, or AIM for the CUE. Its a different type of module, the same one that is in the UC520. This means you can't use the nm-aim or NME install images. The image is available for the UC520.
You can download from the Below URL :
http://www.cisco.com/cgi-bin/tablebuild.pl/UC520-CUE-2.3.4