Easy Install requires a working build environment plus some libraries (note that the versions of for example gcc (4.1 here) may differ on your system). search these packages in Yast, and install them. Not all of them are needed, depending on the features you want:
libstdc++41-devel zlib-devel glibc-devel gettext-devel libstdc++-devel readline-devel gcc41-locale gcc41-obj-c++ libgcc41 gcc41 gcc41-c++ gcc41-objc gcc-objc gcc-obj-c++ gcc-locale gcc gcc-c++
openssl-devel ncurses-devel pam-devel shared-mime-info
If you want to use for example GNOME File-Icons in Webcit, install gnome-icon-theme using Yast and after installation do
cd /usr/local/webcit/static ln -s /usr/share/icons/gnome/24x24/mimetypes icons
You can also use every other Freedesktop.org compliant Icon theme.