How can I repair wrong /etc/rc.conf ?

I'm using FreeBSD 6.4 + windowmaker in IBM notebook. I edited /etc/rc.conf to use LAN other ip address is different from my home address in my school. I got error message from this [ /etc/rc.conf: 131: Syntax error: Unterminated quoted string Enter full pathname of shell or RETURN for /bin/sh: ]

freebsd 6.4 can't load kernel after upgrade

I'm a beginner in freebsd. my machine consists of freebsd-6.4 + i386 bootstrap loader,+ windowmaker after upgrade freebsd-6.4 using sysinstall then reboot the system, I got an error message as follows +++ Loading /boot/defaults/loader.conf Unable to load a