I cant help you with photoshop and i dont really have time to teach you fireworks (what i use). The best place to learn these applications is lynda.com.
If you just want to make channel buttons you can use copilot. It lets you select your blank button and then the station logo graphics and it "merges" them into png files for use on your touchscreen.[Link: guifx.com]
Choose the personal use option (free).