Need a long text in Vd51n

HI,

I need a small information. I already checked and searched it.

First i would like to tell u what is my requirement is. In Vd51 (Customer Master Info record) I need to enter the Customer Description.

But it is allowing up to 40  characters only, Then i checked the long text this will also allow us up to 72  characters only.

But i need almost all very huge data i need to enter . Huge means normally if u open MM01  there is Purchase order text is available , I need exactly like that. What are the possible ways.Need your valuable suggestions.