The first thing you need to do is to change your default paths.
If you have more than one hard drive (highly recommended, even if it’s an external that’s been formatted as NTFS), do all your capturing and editing to that drive.
If you don’t have a second drive (please get one, they’re very cheap these days!!), create a master Vegas folder on drive C and get into the habit of placing all project-related material in that folder.
I use Vegas Pro but the path location should be similar.
Go to Options – Preferences – General.
At the bottom of this tab is the Temporary files folder.
Change this to a Temp folder that you created on your other drive or, failing that, to a different location that you’ve specified on your Drive C.
As to why you can’t find john>app>local>tempory>sony>9.0>, odds are that it’s a hidden file and your system is set to not show them.
To change this behaviour, open up My Computer and select Tools- Folder Options – View.
Part way down this list is a folder called Hidden files and folders.
Double-click it and click the Show hidden files and folders option.
You’ll now be able to find the “missing” files.
BTW, this is for XP, not Vista, if that’s what you ‘re using.