Acess/Excel Project

Currently we have an invoice and reporting system using Access 2000, we import a delimited text file, that is in a sequential order, which populates the database that the queries pull from. Currently Access is setup to work on a text file layout of the current delimited text file (sequential order is important), we now have two new text files, which need to be merged and put into the same delimited format as the older file in order to use our current Access program. If you cannot merge the text files then need the Access program to be altered to use the old layout and configured to accept the two new delimited text files in order to populate the same reports. Must have proven background in Access, need this done ASAP 2-3 day timeframe