csv List manager script

I need a "csv" list management script that runs on my desktop, where I can take a large csv file that has approximately 6 fields (fname,lname,email,phone...etc) and I can break up the file into set amounts I can alter based on my needs. ex. break up a 100,000 rows of data file into 10 seperated files of 10,000. I would like to be able to upload different files into the script to create one large file which I could break down into any amount. If possible I could sort the large file within the script by any value I choose. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Complete ownership and distribution copyrights to all work purchased. ## Platform Windows XP and Windows 98