Guest Account Install google-chrome and non-stadart app

Hi!

I whant to install google-chrome-stable from
https://dl.google.com/linux/direct/google-chrome-stable_current_i386.deb
And:
http://www.oaks.k12.or.us/browsers/OAKSSecureBrowser6.0-Linux.tar.bz2

to my Ubuntu 12.04 lts fresh install from ubuntu.com
and make it available from Guest Account.

OAKSSecureBrowser6.0 i placed under /opt/. That works fine...

I installed simply it in main user, but for guest account it does not works. Says that command not found

> google-chrome
outupts smth like
Failed to move new PID namespace...

How i can solve this? Google-chrome to be launched on guest account, and the same OAKSSecureBrowser6.0?