do /msg hostserv request i.want.vhost
(replace i.want.vhost with whatever you want to mask your hostmask with, can be anything as long as it complies with
http://vhost.deltaanime.net rules)
and whenever it is approved, you will get a memo, do /msg hostserv on
or /msg nickserv update
and it will be covered, and it will be applied everytime you log into nickserv