Why did you install winterboard when you have no idea what it does?
It looks Ike you don't have much idea of what you are doing with the jailbreak.
Better start reading some stuff before you just install stuff you have no idea about!
If you want to deinstall stuff you have to open cydia, tap on Manage -> Packages and pick the package you want do uninstall. Then on the top right you will see a button modify. Hit that and select remove. BE CAREFUL -ON,Y REMOVE STUFF YOU INSTALLED!! don't install stuff that comes as standard with cydia!
When you want to write in caps you have to go to settings, keyboard and enable caps lock. Double tap the shift arrow and it goes blue which means you enabled capslock.