create field on specific positoin

[runrev260805 at m-r-d.de]

Hi,

i need to create several fields, 3 at a line, from a script. The number of fields depends on the number of lines a textfile contains. Each field then must contain an item of the text file. Excatly said, 3 items of each line of the text file have to be put into the 3 fields.
Creating the fields from within the script should be no problem. 

My problem is, i do not know:

How can i place the fields automatically on a specific postion, so i have 3 fields on each line?

How would you name them, so they could be accessed later.?
e.g.   Field_1_3    should mean field from line 1, which contains item 3 from line 1 of the textfile

Regards,

Matthias