making description field editable

hi,

I want to make the field "description" editable in the shopping cart.

For Limit shopping cart I have done through

SPRO setting SRM Server-->Cross application Basic Settings --> Extensions and Field control -->Configure field control --> Configure control for fields of substructures --> Metadata for Fields of Substructures and Table-Like Enhancements

Bus. Object Set Type      32      Limit

Structure Field Name       DESCRIPTION                   

Bus. Object Type            BUS2121   

Set Level                       ITEM  

Set Subtype

.

The same thing I need to do for internal goods and service also..But for this what Bus.Object settype  can I use...?

Thanks

Vivek