Splitting *.csv Files Into Batches

I have a number of csv files with 30,000 - 60,000 records.

I'm looking for some code which will split them into batches of 250 record batches.

Each file id named FY838A, FY838B, FY838C etc.

I need something which will open the file then copy the first row (Field names), open a new book and paste the headers.

Then cut the first 250 records, rows 2:251 and paste them into the new book.

I then need to save them as a *.csv

All are named BatchFY838A (then B, C, D for each one)

Here's the main bit I can't figure out:

I would like to create a destination folder for each file.

I already have a main folder:
say C:IncompInbox
but when each file is created I need to make a folder for it to sit in:

C:IncompInboxFY838AFY 1
C:IncompInboxFY838AFY 2
C:IncompInboxFY838AFY 3
C:IncompInboxFY838AFY 4

(I need to create the FY838@ folder then the destination ones after that)

Until there are no records left to batch. i.e. the code needs to stop when it's completed the list (each one has a different amount of records)

Additional. Along with this I have 3 Word.doc's which need to be placed in each of the above folders, can I do this at the same time)

The end result is to be 3 Word.doc's and a *.csv file in each folder, this is for a huge Mail Merge which is already coded, so each files content will be 4 documents with exactly the same names.