Just got a new carbon road frame with internal cable routing and it came with liner tubing sticking an inch or so out of the cable ports (they're folded tightly back on themselves and taped, presumably to stop them falling back into the frame). Do I just use these liners to run the cables, then remove them once the cables are in place?

The only other internally-routed frame I've ever built up (my TT bike) uses full housing runs so I didn't have to deal with liners etc.