In my experience, Indiana doesn't work well if you have less than 700 megabytes of RAM because the all the features in the GNOME desktop use a lot of RAM and the ZFS checksumming, snapshot and rewind features uses a bit of RAM as well. Instead of using Indiana (a.k.a. "OpenSolaris 2008.05") try this out:
http://www.milax.org/ Milax is a minimized OpenSolaris distro with an XFCE graphical user interface (basically the Solaris equivalent of D amn Small Linux) and it can give you a text only boot up and there is a script that you can run to install it on a USB flash drive. Give it a spin and tell us how it goes. -- This message posted from opensolaris.org