Question on file in arcade

[ruhl]

I need help on something. I already edited 8 files for this extensive mod.
I came to a point on readme that i cannot find.
Template Modifications
======================

Make the following alterations to these existing templates, and save them.

==============
postbit
==============

where is postbit at?

and does this have to be done on all different themes?

[nexialys]

postbit is one template in itself... not a file... and it is found in all the themes you have...

[ruhl]

so Do i have to access it from admin panel? or ftp