Need a tutorial - Normal maps/ sclupt mode in blender

[tadeass]

Hi,

Please, can someone post here any link(s) of some useful and good normal maping tutorial(s)? Just any proven tutorial. I really don\'t know how to (for example) make a straight line in sclupt mode etc. I\'m using blender 2.62. I already saw this one (http://blenderartists.org/forum/showthread.php?138194-Normal-Maps), but that\'s basic tutorial with steps, not with proces of making normal map/bump map itself. Also, must I use sclupt mode for normal maps in blender, or not? Can I add new object and merge it with the high-poly object and after that press 'bake'?

Many thanks,

Tadeass