if you don't already know, the most likely answer is you don't.
Other than that, let's experiment!!
Download Putty (goto
www.download.com and search for it)
use this client, for the address, put in your FTP address and select "SSH"
and then click "open"
It''ll ask about cachine the servers host key or some rubbish you don't care about. click yes.
If the server responds with "Login:" type your ftp user account.
then it'll ask for a pass. respond with your ftp pass.
if it lets you in, you have shell access! if not, you don't.
If you want a shell, look around on the homepage of egghelp.org, it lists places you can get them, or where you can rent eggdrops for use
And here's the cancel button, in case you don't want toast.