Bash: csv file into Adwords Editor Format csv (120K records)

We are using Linux and would like to have a input csv which contains only one field "product name" used to generate a csv file in the adwords editor format. This file will be around 120,000 records long. Adwords has a 50,000 keyword limit, 2,000 keywords per capaign. So we will have 3 accounts set up. We want the script to generate 3 seperate lists. Each generating a new capaign with 1 ad and 2000 keywords... after the 2000 a new capaign until it reaches 50,000... at that point a new list is created. We would like to be able to set the variable information like ad text and others in a config file or section of the script.