Blood Omen 2 is separated by chapter into very long levels. In each level, Kain will come across checkpoints where he will be able to respawn from if he dies. These places also determine how far he's gone, and thus are the points that are recorded when progress is saved. Therefore the guides are split up by these checkpoints, with the headers labeled by percentage (in game assigned values that help determine how far you've gone).
An easy way to find your place in the guide is to go save your game, then save again to read what your current percentage is. Find that place in the guide, then try to find the relevant passage to your predicament or location.
The game begins with Kain's nightmares and his awakening.