highorder difference in OpenFOAM
Hello,
I want to implement a highorder difference sheme which is 4 or 5 order, but it seemed that the difference order is just up to 3 order, the difference template in OpenFOAM now is just two cells, but the high order（4or5） will need more than 3 neighbor cells, so who can tell me how to implement the high order difference with the smallest modify with the current C++ code? 
Hello, i tried to implement highorder schemes in OpenFOAM (WENO + kexact) one year ago, but i found, that i don't know how to select proper stencil for scheme. If You will help with mathematics, then i can help you with implementation

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Can I ask you whether you have implemented this high order (WENO) method within OpenFOAM, or not yet? If yes, can you please kindly tell me is it available somewhere? Regards, Reza 
WENO in openFoam
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