Not sure why you might want to do this but I think it may be
possible doing a screen scrape against the url with the app you
want to create the session on.
Essentially you would need a page the client hits, that would
then do a cfhttp call to the app where you want to create a
session. The cfhttp return will contain a structure and you should
have a new cfid and cftoken on there. do a <cfdump
var="#cfhttp#"> to see what's in there. You'd grab these to
values out of the return and do a cfcookie and set the cfid and
cftoken values to the values you grabbed out of cfhttp.
I've never done this before, but I don't see off hand why it
wouldn't work. If the cfcookie thing doesn't work you may try a
cflocation addtoken='no' and and a url the specifies the cfid and
cftoken from the cfhttp call.