(HELP) I can't find the finder.app or the installer.app

[Y-G]

I can't find the finder.app or the installer.app (on the main page of my iphone)
I lost it when downloading the games for the phone
and thay just took over (the icons on the main page)
and I don't know how to get it back.
plz help asap

(Thank you for your time in advance)

(EDIT)
I have version 1.0.2
and i live in AU so it has been sim cracked (i dont know the proper lingo)
& i was tolled not to up date cause it will make it so i can't use my telstra sim.

[yowiphone]

Restart the iphone. Or just install again if you have 1.1.1

[gusnavarro]

hey! I have the same problem... How did you solve it?