I have the same problem. Also, I couldn't find any .msi files in /usr/pluto/bin. I did find them in /usr/pluto/installers, but they're all zero byte too.
xxxxxx@dcerouter:/usr/pluto/installers$ ls -lrt
total 0
-rw-r--r-- 1 root root 0 2007-03-24 05:53 PlutoRebootSetup.msi
-rw-r--r-- 1 root root 0 2007-03-24 05:53 PlutoBaSInstaller.msi
-rw-r--r-- 1 root root 0 2007-03-24 05:53 OrbiterInstaller.msi
-rw-r--r-- 1 root root 0 2007-03-24 05:53 OrbiterCE_SDL.CAB
-rw-r--r-- 1 root root 0 2007-03-24 05:53 Orbiter_CeNet4_XScale.CAB
-rw-r--r-- 1 root root 0 2007-03-24 05:53 Orbiter_CeNet4_x86.CAB
-rw-r--r-- 1 root root 0 2007-03-24 05:53 Orbiter.CAB
-rw-r--r-- 1 root root 0 2007-03-24 05:53 ImportContacts.zip