Arbortext Editor style sheet updation.

Dear all,

Could anybody help me to find the details about style sheet updation procedure. We are updating style sheet from 5.4 to 6 version, we are looking answer for below mentioned questions:

1) What is the standard procedure to update the style sheet?

2) Is it effect the definitions of style sheet 5.4 when we update to 6?

3) If it effects how to identify the damages of definitions?

Thank you,

Rajesh