I am using Feed The Beast Minecrack Pack v8.1.1, with launcher v1.2.2, Minecraft v1.4.6, and mystcraft-uni-1.4.6-0.9.5.0.0
I know that pack v8.1.1 is said to be for Minecraft v1.4.7, but everything seems to be working for me, except this. Aftrer making over 105 descriptive books (almost two double chests worth), I have almost all the options except some sky options, explosions, and glowstone crystals. I'm not trying to get everything, but to make 105 descriptive books flued by a cow and sugarcane farm is rediculous. I would update, but doing so seems to make me lose all my Mystcraft stuff. Adding the mod back and coping over the world doesn't seem to bring them back. (I may be doing it wrong.) In a test world, I cheated a descriptive book and found that it was in the options page. So, I know it's possible to spawn. Apperently, ages spawn depending on your world seed or something (tell me if this is ture or not.) So, I'm either doing something wrong, or I'm very unlucky.
Help is appreciated.