"libstdc++.so.5: cannot open shared object file: No such file or directory"

I installed the new Ubuntu operating system, the 9.10 Karmic Koala. Actually I installed the Kubuntu version, because I found KDE4 more usable, nicer, and better developing, than the normal Gnome environment. After succesfully moved every program, I found my favorite game is not working with the 64bit version of the new Ubuntu operating system. I got this error:
"libstdc++.so.5: cannot open shared object file: No such file or directory"
Aha, I've seen that the C++ libraries missing, immediately tried to install them:

apt-get install libstdc++5

But it is not working, not libstdc++5 package! Shame!
Tried to reinstall the ia32-libs, but it also doesn't have it...
Finally found the solution here:
http://agentzlerich.blogspot.com/2009/11/getting-32-bit-libstdcso5-in-karmic.html
I try to write a shorter version:

-Download the package here: http://packages.ubuntu.com/jaunty/i386/libstdc++5/download
-Copy the library and the link inside to /usr/lib
-execute the following command: ldconfig