I put a slightly improved version of the column into the add-in section: Column: FileInfo (number of lines, EOL line-endings, encoding of text files, more..)
ReadAll() is faster than ReadLine() and manual counting of lines is not required for both, another minor hint: VBScript is quite tricky at if-statements.
Code likeIf 0 and myString="test" Then .. will always do the string comparison, though the expression evaluates to false right at the start.
This is different from many languages and may result in wasted cpu cycles and weird effects in case you test against function return values.