You'll need Ago's Client Mod Launcher to see server-side content (models, textures, et al). It is also what you use to patch client-side mods into your game.

The easiest way to install Ago's Client Mod Launcher is to install Freth's Modpak, which includes all of the mods the Mythmoor community use. Or, you can download and install the Mod Launcher manually if all you want is to see the server-side content or install a mod or two.