i wanted to rename all in a single go
as per tht discussions i wanted to mention all the member name and new name. that wil take more time.
i wanted all the members to be renamed in the same way for explame take the member name is of 8 character length, i wanted all only to change first 4 characters.
if name starts with abcd for all members tht to be changed to defg for all. other four characters will not get changed