Delete unwanted apps on ZTE MERIT Z990G??????

[M.E]

how do i delete lock apps like the apps Orkut and twitter....ect. i can care less about them and honestly dont need or use them. All they are doing is taking up space on my phone. Can you please help me find away to delete these unwanted apps and give me step by step instructions.
thank you so much
yea i tried that, that was the first thing i tried. setting applications manage applications
they dont show up

[Nebojsa]

you can do that with going to the settings and then find app go remove