How To Go INTO RESCUE Mode Of Alreadty INSTALLED FEDORA!!

Dear All,

This is  Jyotishmaan   Ray.    I  have already installed fedora linux version 7. I get the following options:-

Fedora (2.6.22.1-41.fc7)
Fedora (2.6.20-2925.13.fc7xen)
Fedora (2.6.20-2925.9.fc7xen)
Fedora(2.6.21-1.3194.fc7)

Now the thing is that- i had installed LDAP server for users authentication (downloaded from the openldap site). After that for authentication, i had to change one file named nsswitch.conf file . For the first time when i changed this file as per my need, i got the "segmentaion fault" which made the system unbootable. But then i went into the single mode booting from the main menu.

After that, i changed the nsswitch.conf file (revert back to the original format) and the system was bootable. since i dint have much idea of authentication, i had to revert back each time to nsswitch.conf file and comment one line and check if LDAP server was authenticating the users or not.

Now after i commented one line in nsswitch.conf file, the system BOOTs but then after the taking the logind : root it does not show the passoword prompt-the reason being that the password file is not being read while the system boots.

I  tried several times to skip, the whole process, from the main menu, but then it does  boots in "single mode" too.

Now, from the fedora's site, i have come to know, that there is way to boot the system in :-

Rescue Installed System, But then How To do ??

How can i go into that mode  ;- Rescue Installed System Boot??

Unless i uncomment that line in nsswitch.conf file OF LDAP server, the system will remain un usable as no body can log into the server.

Please HELP, urgently. Your help would be highly solicited by me, as a newbie FEDORA.

I am trying since yesterday, night!!!! Please HELP!!!!!!!


Thanking You In Anticipation,

With Best Regards,

Jyotishmaan Ray