You will have to find the rpm that provides the missing libraries (libao.so.2 and libgtkspell.so.0).
If you were to use a solution such as yum or apt-get it simplifies the process of installing packages quite a bit because you supply it with a repository from which it can pick RPMs if it needs to satisfy dependencies. It won't fix everything all of the time, but if dependencies are encountered that it knows how to resolve, then it will install the additional packages automatically.
If you don't want to go that route, I suggest you look on
http://www.rpmfind.net. or a similar site for the two missing libraries.