We had done for us precisely what you request. Using designer, "UnHide" the Col/Ppd field on the Basics tab. Right-click this field and choose "values". Then type what you wish in list form. We use:
C=Col
P=Ppd
T=3rdParty
A=Ppd&Add
We do not use "Project" so we have hidden that field to make room for the frt_pay_cd on the Basics tab.
Then on our Crystal Pick tickets and Invoices, we use the following:
if {OEORDHDR_SQL.frt_pay_cd} = 'P' then 'Prepaid' else
if {OEORDHDR_SQL.frt_pay_cd} = 'C' then 'Collect' else
if {OEORDHDR_SQL.frt_pay_cd} = 'A' then 'Prepaid & Add' else
if {OEORDHDR_SQL.frt_pay_cd} = 'T' then 'Third Party' else ' '