Import intoto AcyMailing

I need a script to import users into Acymailing lists from txt files (comma separated) located in external server. A button in Admin area will start the procedure. 9 different txt files that contains users, into 9 different lists. Txt files contains only emails, not other fields. the 9 txt files are automatically generated by the server and weight about 0,5 / 1 MB and their urls will remain fixed. Into the txt files are presente always the full user lists so, the import options should be the default of Acymailing : 1) Create auto the Username : Yes 2) Import users as blocked : No 3) Overwrite the existing user info : No The Lists are been already created in to Acymailing and a manual import (throught textarea) is been done. Thanks.