Downloading Files

[VaShaun Jones]

Can someone please help me with understanding the file download  
process please? I download the program to my desktop, open the .dmg  
file, go to the computer folder and open the application and have to  
open in the doc. Last I delete the image by ejecting it and the  
program is gone. It will not open from the doc. All I know to do is  
re-install it again. Last I need to know how to put programs into my  
applications folder. This assistance will be appreciated.