Inventory Item User Categories

I've reviewed many questions over the years related to adding the IV40600.UserCatLongDescr field to various reports and/or documents but have not found a resolution. 

I'm trying to accomplish the following:

Create a SmartList, either using Joins or a view, that will include the UserCatLongDescr from table IV40600 based on the values; USCATVLS_1, USCATVLS_2, USCATVLS_3, USCATVLS_4 in table IV00101 for each inventory item. 

First condition:

IV00101.USCATVLS_1 joined to IV40600.USCATNUM = '1'

IV00101.USCATVLS_2 joined to IV40600.USCATNUM = '2'

IV00101.USCATVLS_3 joined to IV40600.USCATNUM = '3'

IV00101.USCATVLS_4 joined to IV40600.USCATNUM = '4'

IV00101.USCATVLS_5 joined to IV40600.USCATNUM = '5'

IV00101.USCATVLS_6 joined to IV40600.USCATNUM = '6'

Second Condition:

If value exists in IV00101.USCATVLS_1 join to IV40600.USCATVAL and display IV40600.UserCatLongDescr

If value exists in IV00101.USCATVLS_2 join to IV40600.USCATVAL and display IV40600.UserCatLongDescr

If value exists in IV00101.USCATVLS_3 join to IV40600.USCATVAL and display IV40600.UserCatLongDescr

If value exists in IV00101.USCATVLS_4 join to IV40600.USCATVAL and display IV40600.UserCatLongDescr

If value exists in IV00101.USCATVLS_5 join to IV40600.USCATVAL and display IV40600.UserCatLongDescr

If value exists in IV00101.USCATVLS_6 join to IV40600.USCATVAL and display IV40600.UserCatLongDescr

Any help appreciated!

Debi