I can add PDF code dirctly?

Hi all,
A little example of my problem:
I have this text string:
"0.6412 Tw 0 9.963 TD
(expressed as basic data)Tj
0.1223 Tw 0 9.963 TD
(operators and their operands,)Tj
0.2121 Tw 94.512 9.963 Td"

Exist a PDF method for add this code when I create a PDF file?
Obviously in this case, the text matrix, the font and the other param must be added with the code, similar at the PDETextAdd method.

Thank you for the answers,
Pasquale.