iPod touch Customizing and Themes...

I just hacked last night and then upgraded to 1.1.2, the whole shabang...
but, 2 questions..

1. How do you change the slider or battery icon, for example, using customize? I've seen a lot of images flying around the forums and was wondering how I could possibly save them to my iPod Touch and then apply the images.

2. Also, summerboard only allows you to download about 20 themes.. where can I download more?

Thanks!

okay thanks. I'm kinda new to all this though, where can I get ssh and how does it work?
Thanks.

does anyone know about a pc? (unfortunately)

thank you! I also found that WinSCP works great as well. If anyone was interested, there's a pretty useful guide for it here: http://www.hacktheiphone.com/73/iphone_install_ssh_windows.html