Iphone 2g Sms Tones How Do You Work Cydia And Installer On Jail Broken Iphone?

How do you work cydia and installer on jail broken iphone? - iphone 2g sms tones

so that only jailbroken my iPhone (2G) and have the Cydia and Installer. I hear theres a lot of things you can do.
like how the show?
and how to make custom SMS tones. (I have Windows XP)?
HELPPP
I want to be good things. lol
ps. I have the colors of the keyboard and stuff like Cydia. idk, but what the do. lol