Safe mode with an F-Lock keyboard

My apologies if this appears twice. Windows Mail tends to hang when I post
to MS Communities, and some of these show up days later while other just get
lost...I am really starting to hate Vista's UI bugs. Anyway:
I've got a bit of a dilemma. In a nutshell, I turned off admin rights to my
account but UAC's password prompt is not showing any password box (this
can't be by design because the message is saying that I have to enter a
password on the window), so I can't try to do anything as an admin. So I'm
trying to login as an admin, but it requires starting Windows in Safe Mode,
which requires hitting F8 before Windows starts. Problem is, the F-Lock key
is forced OFF for almost the entire bootup duration.

Has anone with one of MS' F-Lock keyboards run into this problem and seen a
solution? It's really, really crucial that I regain admin rights to my
machine soon, but the flakiness I'm starting to discover in Vista has now
gone from annoying to highly disruptive.