visibility of groups

[Richard Riley <rileyrg@googlemail.com>]

I have my groups visibilty regexp set to INBOX - so all mail group
inboxes are always shown. I realise that "by hitting L you can have it
show empty subscribed groups and unsubscribed groups". But how to show
(in addition to the regexp groups) empty subscribed groups that are not
normally shown but NOT unsubscribed groups? Can this be done via Group
levels or something easier and more obvious that I have missed? e.g I
might want to suddenly see my sent folder and my spam folder both of
which are not normally visible. Or should I simply zombify all the non
subscribed groups that become visible with L?

thanks

r.