Hi kawnz,
A 2000 'page' file would probably hold around 140,000 lines of data, assuming no manual page breaks.
An Excel worksheet can hold up to 65536 lines per worksheet.
You could use a macro to import the file, adding a new sheet every 65536 rows, but you might find it quicker to manually split the file into three parts and open each part as a .csv or .txt file.
Cheers