"/usr/local/bin/bashish: line 7: /usr/local/share/bashish/modules/sh/usermode/main: No such file or directory"
You could issue the command:
rpm -ql packagename
to check to list the files provided by the package. Check to see if the package actually supplies /usr/local/share/bashish/modules/sh/usermode/main. If it does then you might try using mkdir to create any missing parts of the path /usr/local/share/bashish/modules/sh/usermode/ and try instlling the rpm again with rpm --force
Be prepared. Create a LifeBoat CD.