If you've saved your dock theme at some point via the ObjectDock Properties window Themes (on the left side) Save Current Dock button (on the right side) you can re-load it - as it stood at the point you saved it - using the Load Previous Dock button right above that.

If not, then if you have a general system backup that was made after the dock was created, you can pull the settings - again, at the point the backup was made - from there if the backup includes (path is XP, don't know Vista) C:\Documents and Settings\[UserName]\Local Settings\Application Data\Stardock\ObjectDock (or ObjectDockPlus).

Those are the only 2 ways I know of....