1. You'd better edit the .sh file in linux enviorment, or just use the root explore's editor.
2. Don't forget to give excute permissions.
3. Your fonts in /sdcard/altfonts should be same as those in /ebook/fonts.
And after reboot, is there a directory /data/altsd was created by the sh file?
Thanks a million for Your hints! The script was not run - no /data/altsd was created. I just made the .sh file in a text editor in windows. However using ultraedit and saving using the "unix line terminator" option did the trick. Thanks again for sharing Your insights for the community!