Fortunatelly i am currently working as well, so maybe you should think that i am busy working to something else...
And i am very greatfull that peoples are trying to help here, thank you all for the quick solutions that you bother gave me :)
To respond to our colegue's question, i usually write a script that will be OK for 20 lines as well as for 2 billions of lines, so i was thinking i will use threads to split the file in.
As a quick solution, indeed i will export the file into a csv format and just the task to be done quick, but i ll want to "beatify" the script as i mentioned earlier.
I think the solutions are more than enough, so i ll stop here...
Cheers, to all!