How do you mould the liners? Stick them in the oven? At what temp and for how long? Then what?
what ever you do, be very careful - no info came with my boots, and after web research went conservatively to 230deg in convection oven - and they self destructed after 8 minutes!
I set my convection oven for 210F, and keep an eye on them. Takes about 10-12m, and I flip them halfway. There's a lot more to the process, which you should be able to find.