You can unhide any icons and rearrange them on the secondary screen... from the home screen click the Menu button, then click the Menu button again and click on Show All... then any greyed out icons can be seen and unhiden... then you can use the Menu button again and select move to rearrange them.
If it were me I'd do a full wipe (options-security-general options-press menu button-wipe) and just clear everything off and set it up my way with my stuff
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