How To Assign Unique PKs And FKs On Split Of Txt Rows Into DB Tables

SSIS 2005

Ok, I have a task in SSIS that does the following and works:

1) Brings in a txt file

2) Using a conditional component, checks for a value in the row.

3) Based on the value, splits the row into one of 3 tables (Header, Maintenance, or Payment)

Here is a print screen of what I have so far which splits Header rows into it's own table, Maintenance rows into its own table, and Payment Rows into its own table:

http://www.webfound.net/qst_how_to_add_header_PK_and_FKs.JPG

Here is a print screen of the conditional split:

http://www.webfound.net/conditional_split.jpg

Please take a look at the txt file here before it's processed:

http://www.webfound.net/split.txt

http://www.webfound.net/rows.jpg

Notice that the pattern is a header row, followed by it's corresponding detail rows.  The detail rows are either Maintenance or Payment rows. 

I need to somehow during the Script component or some other way, to assign a unique HeaderID (PK) to each of the header rows and add that ID to it's corresponding Maintenance and Payment detail rows in their corresponding tables as a PK.  The problem is

1) I don't know how to do this in the flow of the components as I have it now

2) How do I tell it to create a new Header ID and Header FKs for the detail rows based off of each new Header row?

In the end (much later on in my entire package), the goal is to be able to run a stored proc to join and select the Header and Details rows back into a final table so I can then do more processing such as split each header and detail rows into their own txt files, etc....I don't need to go into details why but just know that this is the goal, therefore I need to relate each header row with their corresponding detail rows that are split off into a MaintenanceRow and PaymentRowTable