modify multiple roles

Hi,

I have a requirement to modify multiple of roles with one transaction code.

We have transaction code ex: xxxxxx exists in around 40 roles, but we replace xxxxxx with another t-code ex:*******

How can I replace the old t -code with new t-code in all roles?

Is there any smart way of doing it? or Do I have to change each role?

Please suggest.

Many Thanks.