Mass upload program change for Material Master

Hi,

There are few programs to Mass upload material master records .

like RMDATIND .

Our requirement is

There are few screen exits written on these transaction MM01 to add customized fields ,, Suppose i have added new field in BASIC Data2 in MM01. In this case If we try to execute standard Mass upload program it only consider standard fields form MM01 .

Our current requirement is this upload program should also consider customized fields too. we 10 customized fields added in MM01.

How can we add customized fields to standard mass upload program ...

Please help me ...

Thanks,

UVS Varma