Possibly the "crash" was caused by lack of available memory for the installer. That application alone takes 1.9 GB to function smoothly.
Most older computers need to use Swap often to compensate for having not much RAM. Swap can be compared with the Windows Pagefile, a place where the system puts data from Ram to Disk to free fast Ram for the most urgent tasks. Swap uses raw data which is relatively fast to access when needed.
My advice would be to create a Swap partition before starting the installer. There is a nice Partitioner application available in Linux with a rather simple interface called gparted. That application is not included on a default Bodhi CD but could be easily installed temporarily.
Just ask if you need more details/help about that.