The form key (the hash at the end of the url) is used for secutiry. You can disable but isn't recommended.
There is some kind of problem with the url?
Sorry but I don't understand the question.
Currently your URL is right.
If you want to change the default admin Url, go to app/etc/local.xml
<admin> <routers> <adminhtml> <args> <frontName><![CDATA[admin]]></frontName> </args> </adminhtml> </routers> </admin>