This is a decent method to use, however it's uses are limited and many mods use it nowadays. Script merging may be required. however it's very effective to use to spawn a custom placeable :)
http://www.lucasforums.com/showthread.php?t=137370)
Also, this thread lists some pretty helpful tips on how to place objects or inventory in to nearby containers, next to pc, etc.
http://www.lucasforums.com/showthread.php?t=143412)
And of course, the main thread I go to with my placing woes. (Thank you a million times plus RedHawke, tk & D3) :lol:
http://www.lucasforums.com/showthread.php?t=143536)
I feel your pain when it comes to scripting.. however TSL is just really not friendly (at all) with unique placeables. It was basically the main reason that forced me in to learning some scripting techniques. ;)
For Random loot.. this thread sheds a little light on everything :D However for your question on items added to random loot once added to the game..unfortunately no. :fist:
http://www.lucasforums.com/showthread.php?p=1811611)