I have a macbook pro with Tiger installed. I want to restore data that is already deleted from Trash, and the data is also from a year ago. Is this still possible? using 3rd party software maybe?

After a year, it is quite doubtful that you’ll be able to retrieve any useable data from any of these files.

And the issue is not necessarily that you’ve moved files around, or otherwise re-arranged the drive, it’s that the probablitity that a cache file, or another transistory file hasn’t override a block that use to be attached to one of those files is minute. Once the block is overwritten, even by 1 byte of data, it’s virtually impossible to recover that file…

But, certainly give it a try…

FileSalvage is a undelete / data recovery tool, that offers a trial mode – No Registration Number – Trial Mode

Without a registration number it is only possible to start using a version of FileSalvage with limited functionality. In Trial Mode the user will be able to scan for files but will be unable to recover them. For full recovery functionality, the user must register his or her version of FileSalvage. To do this, purchase the software online or via a retail channel, and then simply select “Register” from the FileSalvage drop menu and enter a valid registration number in the dialog screen.

And there’s a number of other data recovery tools that are available for low cost…