Assigning host route to loopback

I'm attempting to assign a /32 IP address to lo0:1 on a Solaris 8 box and
am having some difficulty.  Hopefully someone here can point me in the
right direction.

I don't seem to be able to set the netmask for an IP to 255.255.255.255
in the /etc/inet/netmasks file.  This IP is out of a larger /24, of which
I've used a /26 on a physical dmfe0 interface.  So I want things to look
something like this:

                                            .-----------------------.
                                            |   lo0  127.0.0.1/8    |
  192.0.2.1/26 gw <-- dmfe0:192.0.2.10/26 - +                       |
                                            | lo0:1  192.0.2.254/32 |
                                            `-----------------------'

Setting up the interface via ifconfig will get the netmasks I want, but
I would prefer to store this in the configuration files if possible,
particularly since I want the configuration to survive across restarts.
I had set lo0:1 to 192.0.2.65 with a mask of 255.255.255.252 successfully
so I know VLSM is working at least in part.  I've also tried using an
entirely different IP and a 255.255.255.255 mask, but that didn't appear
to be any more successful.

Is the only way to get this configuration to run something like:

  ifconfig lo0 addif 192.0.2.254/32 up

in a startup script or am I missing?  Thanks in advance for any assistance,

John