Uploading multiple images to remote server

Hello All,

My current situation -
FCK version - fckeditor2.6.4.
Language - PHP 5.1.1

I am operating my server (machine A) from my local PC (machine B) and want to upload to another server (machine C).
A will have uploaded HTML pages which has links for images residing in C. So when creating HTML Page then want to save HTML page in A and upload all required images to C.

Problem -
Uploading images to A is working fine but not have any idea to upload images to C. (Thinking of using FTP, but don't know).

Any idea/suggestion is welcome.

Thanks in advance