I recommend that you use at least 1024X512 resolution so that the resulting image will be less blurry. The bigger the resolution, the better the picture quality but it will consume more memory and it will take longer to render. In this case I used 1536X768. Check the box marked "Compute Advanced Lighting when Required”. This will speed up the render a bit.
In the "Antialiasing” part, select "Catmull-Rom” filter. In "Global SuperSampling” select "Max 2.5 Star”. You can play around with each parameter to get the result you want.
Then make sure that you have selected the "Camera” viewport and hit "Render”.
Here's a Still of the result I got.
The ceiling looks black because I have no lighting except the default lights.
Once the render is done you should get a picture similar to the one above. You can now use your mouse to "look” around the house and get a more "life like”feeling of the space you are in.
You can then click on File>Export>Export QuickTimeVR and you can save your file as a self-contained quicktime movie. This way you can send it to your clients and they can look at it in their computer (Quicktime 6 required).
I hope this was of some help. If you have questions or comments, don't hesitate to e-mail me I have attached the file that I made from this tutorial that can be downlaod here. (Test-QTVR.mov)