Welcome to the board 2009!
First you can find out a lot about apps/programs etc. by going here:
http://www.ppcgeeks.com/700w-wx-faqs...-09-t2427.html
Another good resource is to visit the thread regading "today screens"...found here:
http://www.ppcgeeks.com/your-today-screen-t810.html
As for themes...go here:
http://www.ppcgeeks.com/pocket-pc-themes-f32.html
Lastly...as far as equalizer settings it's really up to you what sounds best. It also depends on the quality of your original source. There are no real wrong settings. It'll be different for movies, music, whether you're using headphones, what type of headphones, what type of music, etc. Just play around until you find what sounds best.
late,
Coz