Hi Annie, you nailed it!!  Next couple of steps:  Resolve that link problem, get more sleep and then:

Ye olde texture room:  Once you select the glass type from the wizard menu and apply it to your goblet  that shader will now appear in your list of shaders,  Presently you have red, and the default grey shaders located there (the shaders' menu is located in the assembly room right pull out menu (the one you have posted).  Note their names and what they are assigned to-the shader will list what objects they are assigned too. 

In the assembly room (here we go again with Ye Olde click and drag), click on your glass shader and drag it to the screen's stem and base-now you will have that glass shader on the entire goblet.

Once you got that done-we will want to do a quick preview render:

That will require an atmosphere (unless you want to go through gyrations with the lighting).
Click on Scene>two little down carats and select sky (not realistic sky)-In edit you can rotate the sun any where you want, change its color etc. back out  -see where it says ground, drop that puppy to around -33 inches.  That ground plane is a pain in the meta physical peanut butter (substitute for a three letter word).

Another tool great to know now, see where it says ambient, when you open that thing up, you will see a brightness slider--that controls the intensity of the objects' shadows.  A setting of 0 means that the object is on the moon, maximum shadow, no air, vaccuum.  A maximum setting indicates that the object is on Venus, no shadows cast--extremely heavy atmosphere. The setting on Earth would be around 30 percent.    For now set it to zero-we'll adjust it later.

Now for the quick render.  In the assembly room select that camera icon and drag a rectangle around the goblet-that will start your rendering--may need to move the camera angle to get what you want. (sky recommended for now).

Give me a screen shot:

Next step, putting the printing or decals on your goblet--means selecting your goblet, opening the UV mapper, box mode, six sided display and exporting that .bmp to your PaintShop Pro, creating two more layers, writing, printing, and importing various designs, saving the resulting stuff as a .jpg-pulling it up again in your texture room-color and bump channels and doing a semifinal rendering of your master piece.

I'll go through the above process with you step by step, when you are ready.

Finally, building floors and walls for the goblet's simple scene-

Next project:  you decide:  table and chairs, a steriling tea service-- tea pot, sugar and cream cup on a platter, lamps-air or space craft--

It might be a good idea now (if you haven't done so)-download some of the neat materials stuff for Vicky, Victoria in Rendo freebie section--just because it was made for the model doesn't mean you can't use it for other stuff--Google wood, metal, organic  textures--ask Acadia for neat stuff-heck ask her first and save time.  Jan