since the installer uses NSIS (Nullsoft Scriptable Install System), yes.
basically you just have to run the installer with the /S parameter (case sensitive)
for more, you can check
http://unattended.sourceforge.net/installers.html
and
NSIS' homepage
[ranting]man, first post in months, I miss this place sometimes. I'll need some time to get up to date when I get back from Japan though (sorry for ranting, I'm tired :P )[/ranting]