Sandisk Extreme 480GB SSD on Macbook Pro 15 inch mid 2012

So heres an update.  I tried what you said about the command option p and r.  I started up the computer holding the option button with the SSD atttached to the SATA cable and it popped up in disk utility so I did an erase with the GUID Partition and then tried to download Lion through the network install and went to bed.  When I woke up the download had failed saying something like additional components were not downloaded and now when I restart it the SSD isn’t showing up?  Any other ideas?  Thanks again for all your help.