I think you mean table rather than layout. Every time you create a new table, FileMaker creates a new layout of exactly the same name for you, but they aren't the same thing and you can create many different layouts that all are based on the same exact table.
I would advise against actually moving the file from one table to another like this. Instead, I'd use a field in the table to record the item's status. Moving an item onto the salvage list would then be a case of changing this status field to "salvage" or some such value. Your layouts, scripts, portals, etc can then be set up to automatically keep "salvage" assets out of the list on your main layout and non-salvage assets off the list on your "salvage" layout.
Yes, but I have no idea which ones to suggest beyond this basic observation:
Many of FileMaker's script steps directly correspond to a menu option that you can select manually. Thus, beginners can often write down each menu choice they would make to do the same thing manually, then they can go to Manage scripts and select the corresponding script steps in the same order that they wrote them down and with the same options that they selected manually.
I would suggest trying to create a script and posting questions in the forum as you encounter a specific problem with that specific script.
OK thank you!