Remaping of movment type to a specific GL a/c

Hi friends,

we are using old GL a/c 7005000 : Non-Count Inv Discrepancy,Proposed GL a/c: 7000600 :IO Purchase Price Variance

we want's to remap the GL a/c's to specific movement types 301,131,641 and 647.and also we need to deactivate the following movement types 340 351,352,415,416,621,622,671,672,677,6B1,6B2,6B7,6B8,6W5,6W6.

I have check with OMJJ, OMWB and OMWN transaction but i have not get how to move further.

Please give me an idea how to remap the gl a/c insted of old gl a/c.what are the precations i have to take to do the same.

please let me if you guys are having good idea about the same.

Thanks... Sloka.