I think i know
ok, go to player--->refine_proto
ok there the vnum1.....vnum2.......vnum3 etc. are the items you need to upgrade the items just change everything in columns vnum 1-2-3-4 to zero and you are done.
And if you want to change the rates also you have to change the prob (1-100) if you put 50 it will have 50% chance to upgrade
I hope you understand everything i wrote because i come from greece so i don't know english very well
I hope i helped you.