Hello,
1) Yes, you can still use other checkout paths and not offer shipping insurance. Just make sure to disabel Auctiva checkout and Auctiva Shipping Insurance.
2) Auctiva offers free, unlimited image hosting.
3) The Auctiva store window is placed in your active listings by default. If you don't want this feature, be sure to disable it BEFORE creating your eBay token.
4) If you don't use the Auctiva store window, the only time a buyer would see Auctiva's brand name is when they view your free supersized images, as they are hosted by Auctiva.
You're welcome to use any or all of the features Auctiva has to offer. Welcome.
-Mike