[ic] Variable in shipping display name

[IC]

Hi folks,

Is there anyway to display a variable in the shipping description using an
either/or in shipping.asc? I've tried this but it just prints the tags as
the shipping description. I want the shipping to read either "2-3 days" or
whatever I have set "shipmessage" to:-

ups_ground:   UPS Ground [either]2-3 days[or][var shipmessage][/either]

        criteria        weight
        min             1
        max             10
        cost            e Can not ship item by UPS Ground.


Thanks,
Andy.