Is there a way to get a roll over effect on the graphic elements in the nav bar so when the mouse cursors hovers on the images they change to other images in phpBB3? For instance a CSS script that exchanges one picture in the nav bar for another whenever you point your mouse at the image?

Yes there is a way just give me some mints to give you the code

I give him the full code

Hi
Remove your navigations out of Admin panel and add them all through CSS. Also go to Display >> Headers and navigations >> Display only images in nav bar: YES

Do this for the static image:

Code:

#i_icon_mini_index {
background-image: url('IMAGE LINK GOES HERE');
width: XYpx;
height: XYpx;
}

And than this for hover:

Code:

#i_icon_mini_index:hover {
background-image: url('IMAGE HOVER LINK GOES HERE');
width: XYpx;
height: XYpx;
}

Do it for all navigations, just change the end of #i_icon_mini

Like this:
_portal {
_portal:hover {

This is for the rest of navigations:
_profile
_calendar
_gallery
_message
_new_message
_register
_login
_logout
_search
_faq

Thank you all guys! I will check out the code later today

I had to change things a bit to make everything work, here is the code I used:

Code:

#i_icon_mini_index{width:75px;height:65px;background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/n54okmjpg.png) no-repeat 0 0;}
#i_icon_mini_index:hover{background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/n54okmjpghover.png) no-repeat 0 0;}

#i_icon_mini_calendar{width:60px;height:65px;background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/28thus0jpg.png) no-repeat 0 0;}
#i_icon_mini_calendar:hover{background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/28thus0jpghover.png) no-repeat  0 0;}

#i_icon_mini_gallery{width:60px;height:65px;background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/24majuxjpg.png) no-repeat 0 0;}
#i_icon_mini_gallery:hover{background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/24majuxjpghover.png) no-repeat  0 0;}

#i_icon_mini_faq{width:60px;height:65px;background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/w8b1wpjpg.png) no-repeat 0 0;}
#i_icon_mini_faq:hover{background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/w8b1wpjpghover.png) no-repeat  0 0;}

#i_icon_mini_search{width:60px;height:65px;background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/90vdczjpg.png) no-repeat 0 0;}
#i_icon_mini_search:hover{background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/90vdczjpghover.png) no-repeat  0 0;}

#i_icon_mini_members{width:60px;height:65px;background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/23lcnwjjpg.png) no-repeat 0 0;}
#i_icon_mini_members:hover{background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/23lcnwjjpghover.png) no-repeat  0 0;}

#i_icon_mini_groups{width:60px;height:65px;background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/2i5ezqjpg.png) no-repeat 0 0;}
#i_icon_mini_groups:hover{background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/2i5ezqjpghover.png) no-repeat  0 0px;}

#i_icon_mini_profile{width:60px;height:65px;background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/2z6avsljpg.png) no-repeat 0 0;}
#i_icon_mini_profile:hover{background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/2z6avsljpgprofile.png) no-repeat  0 0;}

#i_icon_mini_message{width:60px;height:65px;background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/xf9oa0jpg.png) no-repeat 0 0;}
#i_icon_mini_message:hover{background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/xf9oa0jpghover.png) no-repeat 0 0;}

#i_icon_mini_new_message{width:60px;height:65px;background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/sqtwcxjpg.png) no-repeat 0 0;}
#i_icon_mini_new_message:hover{background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/sqtwcxjpghover.png) no-repeat  0 0;}

#i_icon_mini_logout{width:60px;height:65px;background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/1zdomshjpg.png) no-repeat 0 0;}
#i_icon_mini_logout:hover{background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/1zdomshjpghover.png) no-repeat  0 0;}

#i_icon_mini_register{width:60px;height:65px;background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/2h2r585jpg.png) no-repeat 0 0;}
#i_icon_mini_register:hover{background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/2h2r585jpghover.png) no-repeat  0 0;}

#i_icon_mini_login{width:60px;height:65px;background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/2ltlytijpg.png) no-repeat 0 0;}
#i_icon_mini_login:hover{background:url(http://i624.photobucket.com/albums/tt328/SoulMonster/2ltlytijpghover.png) no-repeat  0 0;}

Everything works perfectly now!