There is actually info on this in a couple of threads if you do a search. To cut a long story short tho, with current firmware the link on the modules page doesn't work. You have to manually enter the URL (http://192.168.1.100/adm/getform.html?name=../modules/INFO/www/index).
There is a manual fix suggested by Omega where you edit the getform.html file in your IMGDUP copy of the file which should make the module page work properly again. You can find it if you search the forums. I think it's on the 2nd page of one of the threads.