Well you just had to make me search for it, instead of leaving it attached here, didn't you

I found where you attached it in your
other post , but it was just a placemark and not file of several placemarks that we can play to view a virtual flyover.
You need to create a folder in My Places and move all the placemarks for your flyover in that folder. Then save that folder to your hard drive by right-clicking on it, and select "Save As". When you post it, browse to the kmz file you just created on your hard drive, and select it.
Hope that is of some help.
If you doesn't, it might help you to understand it a little better if you download one of the other flyovers here and open it up. You will notice that it will load a kmz file in your Temporary Places folder in your Places list. Click on the black triangle to the left of the kmz file and it will drop down to a folder. Click on the black triangle next to the folder and it will reveal the contents of the folder. The contents should be a series of placemarks.
Now to play the flyover, first ensure that no other placemarks, folders etc. in you Places list is checked. Then checked the box next to the folder that contains the flyover. This will also automatically check all of the boxes next to the placemarks in the folder. Now select the folder and click on the Play button at the bottom of your Places list. Your viewer should take you automatically to each placemark in the folder.
Tip: when creating a flyover, you will have more stunning results when you chose an area that has hi-res imagery.
Have fun
