blog entry reference style

I wish end note (the citation manager software I use) had "Blog Entry" listed as a possible reference type. I end up having to list them as a magazine article to get the relevant information, and the URL never shows up be defalt in CACM style; I always end up having to put it somewhere weird to actually get it to show up in my list of references. end note lets me make up my own styles, why can't I define my own reference types? it shouldn't be all that hard. (or maybe I have to upgrade to version 9 to get that...)