How long should I hold a lighter to it?? That idea scares me.. I will do it but time estimate. I don't care if I get burned, I don't want to harm my disc.
Just get a feel for it, do it for shorter amounts of time at first to see how long its gonna take until it becomes soft enough to mold. You wont harm the disc, just do it in small increments at first to get an idea of what its going to take.