Posting this information here because it was originally posted in the Xbox boards. (http://www.gamefaqs.com/boards/615803-the-elder-scrolls-v-skyrim/61029785
I married Sylgja from the mining town, and have been trying for a few days to figure out how to give her something different from her ugly mining clothes. She is not a follower, so I cannot change her inventory, and for the record reverse pickpocketing *does not work* (non-follower NPCs, or at least Sylgja, will not equip items placed in their inventory, and additionally they periodically will regenerate their original gear and re-equip that instead)!
In order to change the equipment on a spouse like this, you need to use the console "equipitem" and "removeitem" commands with appropriate item ids to change their inventories. Importantly, when using "equipitem" and "removeitem" you have to include an additional parameter, "1" at the end, or the change will not be permanent (thanks to a user named mcatanio for this information!).
The full list of steps to do this: 1. Find the item ids of all of the visible gear your spouse has that you do not wish them to use. You can use the "help" console command to do this. As an example, to get the id of Sylgja's mining clothes, I used the command:
help "Mining Clothes" 4
There are two different mining clothes in the game, with ids 0006FF43, and 00080697, so I had to try both. The later ended up being correct.
2. Remove any items you don't want them to have permanently with the "removeitem" command and "1" parameter. My command to get rid of Sylgja's mining clothes was:
remoteitem 00080697 1
The items will not visibly disappear until after you close the console. Do not skip this step. If you remove their original items by other means (like pickpocketing, or the "removeallitems" command) their original gear will magically come back and they will re-equip it after some time has passed.
3. Get the item ids of the items you want to give them. You can either consult an item id list, or use the "help" command like you did in step 2.
4. Use the "equipitem" command with "1" parameter to permanently give them the new equipment. In my case I used:
Forgot to mention one important detail - you need to "target" your spouse while the console was open in order to ensure that these commands target the correct npc! To do this, simply open the console, and then click on your spouse's head with your mouse. When you do this, the NPC's id number will show in white text in the center of your screen. Make sure you have your spouse 'targetted" before using any of the commands above.
Any idea what Shahvee's clothes are? There are 2 easy ways I know of to find the clothes, either pickpocket if you have the perks (not to take the item, just to see them) or save, kill them, write down the items, then load your previous save. If they are essential, you might have to do help <name> 4 to find their npc base id, then type setessential baseid 0 to remove their essential tag, then kill and look at the gear (make sure you do this after the save so they are back essential when you reload it).