Fedorea rescue disk would work, but I can not advise you further on how to use it, as I have never used a rescue disk from a distro.
I can however tell you about live-cd's and they are fantastic. The principle is this. You have an entire OS on cd. It only uses your ram, and cdrom. Once the OS is loaded, you then can gain access to anything on that computer. Yes - This is why computer security involves "who" can access your physical computer - but that is another subject.
Here is a list of most of the live cd's around
Once downloaded and burnt, pop the cd in the cdrom and reboot. Once loaded log in as root and go to the file manager that you use. i will assume a KDE base for simplicity.
1) Open konqueror
2) Click on /mnt
3) find where your main root partition is eg /mnt/hda1
This part is important because it dictates what we need to use in the mount command.
4) open a console and enter
mount -t ext3 /dev/hda1 /mnt/hda1
This means mount - with file type "ext3" - the device "/dev/hda1" - on the file structure "/mnt/hda1"
If your file system is reiserfs the change ext3 to reiserfs
5) Go back to your browser and you should be able to see you hard drive files under /mnt/hda1
6) Edit /ect/fstab by right clicking on the fstab file. Choose "open with" then "Kate"
# <file system> <dir> <type> <options> <dump> <pass>
none /dev/pts devpts defaults 0 0
none /dev/shm tmpfs defaults 0 0
tmpfs /tmp tmpfs defaults 0 0
usbfs /proc/bus/usb usbfs defaults 0 0
/dev/hdc /mnt/dvd auto noauto,users,rw 0 0
/dev/hda1 /boot ext3 defaults 1 1
/dev/hda3 /home reiserfs defaults 1 1
/dev/hda4 /data reiserfs defaults 1 2
/dev/hda5 / reiserfs defaults 0 1
/dev/hda6 swap swap defaults 0 0
/dev/hda7 /var reiserfs defaults 1 2
/dev/hda8 /opt reiserfs defaults 1 2
/dev/hda9 /usr reiserfs defaults 1 2
Once adjusted, click save and reboot. Please realise this is only a guide. Do not put in my actual values. Also, there are so many ways of doing this, but I am trying to give you the easiest way using a mouse with a file manager. Hope this helps