I just installed a Moss carpet kit in my Sprite. The order I worked in was this:
1. main piece on the rear fenders.
2. trim where fender meets rear of cockpit.
3. large vertical area behind seats.
In the footwells,
4. Raised front trim by the transmission tunnel
5. Raised trim in front of the seats.
6. main footwell area. (these pieces have trimmed edges)
7. rear portion of tunnel between seats
8. panels under the seats
9. Gear shift area (this piece has trimmed edges)
10. rear shelf (this piece has trimmed edges)
Hope this is of some help. I may not have given the correct part terms, apologies in advance.
Two other items I found. When I trimmed the carpet kit, it seems to want to ravel a bit, so I used a heat gun on low temp to "melt" the edges and seal it. Gave it a little bit more of a finish to the edge.
With the leather shift boot cover, it was difficult to slide the tunnel cover on. Some liquid soap made it slid on a lot easier.