SQL Server 2008 :: Splitting Param Array Into Groups Of Four With Offset

I'm getting a file that essentially has a parameter array: a specific like would have three known values, and then x number of groups of four parts;

The question is how to handle logical groups of parameters; i though maybe by using a modulous on their itemnumber ...

So I can easily use DelimitedSplit8K to definitively find the first thee values, but how do I dynamically get X number of groups of four; eventually i need the first three fields combined with each quadgroup.

So a rough example of the desired output is this:

this:
'03,0000001,USD,010,81257946,,,015,121809761,,'is split into rows with the first three columns included in each row:
030000001USD01081257946NULLNULL
030000001USD015121809761NULLNULL

Here's a setup i've put together:

IF OBJECT_ID('tempdb.[dbo].[#AccountIdentifier]') IS NOT NULL
DROP TABLE [dbo].[#AccountIdentifier]
GO
CREATE TABLE [dbo].[#AccountIdentifier] (
[AccountIdentifierID] INT IDENTITY(1,1) NOT NULL,
[DateReceived] DATETIME NULL DEFAULT getdate(),
[RecordCode] VARCHAR(3) NULL,

[Code] ....