I successfully installed Google Earth by downloading the .bin file and just running it. Note that it is a POSIX shell script which contains text and binary data and not a RPM package. You can think it as an auto-installer. In other words you cannot use the Yast Software Manager application, since it manages only RPM files. Here
is a quick howto (that is how I installed it on opensuse 11.1, last February).
I leave to other members to question about the usefulness of an antivirus software in Linux. Anyway, since the downloaded RPM has not been built by opensuse, better to test it from the command line (so that you can read what's going on directly from the terminal).
Using the rpm command, you can first test the installation, without actually install it:
rpm --test -Uvh avg85flx-r290-a2950.i386.rpm
if you see simply the progress bar and no error message thereafter, you can proceed with installation. This means that all dependencies are satisfied.
However, at the command line you have a more complete and suitable software manager: zypper. The command
zypper install avg85flx-r290-a2950.i386.rpm
will ask confirmation prior to install and it will give messages and advices if something is missing or wrong. Feel free to post them here, if in doubt.