Fedora :: Programs Not Working (Version GCC_4.2.0 Not Found)

New to fedora and a bit stuck atm. I got Fedora 11 installed ok and working fine. I then installed Oracle, Adobe Reader and Opera. All seemed to go ok. On booting the machine today, it booted fine, but when I click on places->computer or places-network or firefox or the file browser all I get is the arrow with the ring spinning around it for a bit and then nothing.

So, I tried to start up Firefox from a terminal and I get:
/lib/libgcc_s.so.1 : version 'GCC_4.2.0' not found (required by /usr/lib/libstdcc+.so.6)

I get a few errors when I try and start opera, but one of them is the same as above. I tried nautilus - same thing. I'd be willing to bet it's the same for places->computer and places->network but I don't know how to start those up from the terminal. Part of the install instructions I followed have almost certainly caused it, but I don't know how to reverse them, this is what I did:

"unzip Oracle_Access_Manager10_1_4_0_1_linux_GCClib.zip

This gives you 2 files:
libgcc_s.so.1
libstdc++.so.5

Now move the libgcc_s.so.1 file to /lib/libgcc_s.oracle.so.1
sudo mv libgcc_s.so.1 /lib/libgcc_s.oracle.so.1

And the most important one:
sudo ln -sf /lib/libgcc_s.oracle.so.1 /lib/libgcc_s.so

(Even after the ldconfig command is given in the reboot fase, the link for /lib/libgcc_s.so remains!)

Then you have to rename the /usr/lib/gcc/i586-redhat-linux/4.4.1/libgcc_s.so to /usr/lib/gcc/i586-redhat-linux/4.4.1/libgcc_s_so
Otherwise /lib/libgcc_s.so.1 will be used in link and not /lib/libgcc_s.so, therefore the link will fail

Now you can start the installer by
./runInstaller.sh
And the linking will succeed."