Do you know where the file needs to go?
You need the full path name of the directory (folder) where it goes, and then you can use the "mv" command from the command prompt to move the file from the location you save it, back to where it should go.
This is going to be a little tricky since you have spaces in the name of the folder where you saved it. I am not sure where that should be extacly, but I found this location on the web:
/System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/ HIToolbox.framework/Versions/A/Resources
You can put double quotes around the file name though, like this:
mv "Desktop/SYSTEM FILES NEEDED DONT DELETE/Extras.rsrc" /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/ HIToolbox.framework/Versions/A/Resources
Try pasting this into your terminal window and then pressing RETURN to move the file.
This should move the file from your saved location to the folder listed above.
A couple of things to be aware of:
1. I am not sure that this is where the file should go. I don't have 10.2.8 loaded, so I can't verify this.
2. Moving the file could cause permission issues, but at this point, I don't think you have anything to lose.
3. You could get an error relating to the destination file being in use.
If you try this and get some error message, let us know what you get, and we will see if we can help...