You can navigate your remote computer's file system by using the "pwd" (print working directory), "cd" (change directory) and "ls" (list directory contents) commands (like in a shell).
You can even upload files (using your Jabber client "send file" function):
The file is uploaded in the current directory:
You can also download files using the "file" command:
(you have to open port 15000 in your firewall )