EDIT: This appears to be what you and I want:
[url]terrain texture splatting, fixed-function]
however I have no clue how to multiply the result with CSPrimaryColor as rdb mentions (I want my game to have shading without the shaderGenerator, if that makes sense)
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Ah, I have (ironically) just recently been searching trying to figure out how to do exactly what it looks like you’re trying to do!
This is good news for me, anyway I (could be very wrong, however) this appears to be called texture splatting (at least a search in google appears with these results…)
I know, that was barely helpful, just sayin’ I’d really like to know how to do the same exact thing 
~powerpup118[/url]