So wait, how do you...?

[cbvbguy]

How do you open a text file, add lines/stuff to it, and save it?

Append to a file.

Open "C:\MyTextFile.txt" For Append As #1
Print #1, "My added text"
Close #1

This will add text to the end of a file.

[gwdash]

Open FileName For Action {Append, Input, Output, Binary, Random}  As FileNum (Use FreeFile Function)

'For Text File, ex.
Dim FileNum As Integer

FileNum = FreeFile

Open "C:\MyFile.txt" For Append As #FileNum

Print #FileNum, "This is some Sample Text"

Close FileNum

[kedaman]

You could read my file tutorial on my homepage, it covers the most basic things about files