The Rat
Is your room looking a little too clean? Feel the need to infest it with disease carrying vermin? Of course you do! Well then look no further then my humble Rat. This little hyper-active will add a bit of life to any boring old room, and the Black Plague too! Perfect for Dungeons, Sewers, Garbage Heaps, Castles, and any place you're likely to get Tetanus. Use the Decorate Tool to copy it a few times, and soon you're virtual home will be TEAMING with Rodents! YAY!

Not fond of the basic brown? Wish the little buggers could squeak? The DERIVE IT! Make your own version, and even sell it in the catalog for a small markup over my original, and you can keep the extra profits for yourself! You can express yourself AND earn credits at the same time. How's that for a sweet deal? You'll need a full account on IMVU, as well as a copy of Previewer. You can find out more about Deriving on the IMVU's Education Center. Below are the templates you'll need to get started:

This is the texture used on the Body of the Rat. Use this to make small changes to the design, like adjusting color balance:

This is the Wireframe layout of the Rat. It shows you exactly how each pixel attaches to the model's body. Use this to build a completely new texture map from scratch. This is something for the Advanced users:

This is the texture used for the Tail:

This is the Wireframe of the Tail:

To add sound, for whatever reason, I highly recommend you download and use Audacity. It's a free sound editing tool that can export out OGG sound files. OGG sound files compress down to less then 1/10th the file size of WAV files. SO USE OGG FILES!!! You can download it here:
http://audacity.sourceforge.net/