[Mediawiki-l] Google Search and default error

[Stabatha Cogsprocket]

How can I get my search box like the one at http://www.wowwiki.com where it
searches in google in the search box?

Also it uses Google to search within templates -
http://www.google.com/custom?domains=wowwiki.com&q=template%3AServer&sitesearch=wowwiki.com&sa=Search&client=pub-5713967283907580&forid=1&channel=9345733685&ie=UTF-8&oe=UTF-8&cof=GALT%3A%2346ABFF%3BGL%3A1%3BDIV%3A%23EEEEEE%3BVLC%3A4274FF%3BAH%3Acenter%3BBGC%3A333333%3BLBGC%3AFFFF99%3BALC%3A46ABFF%3BLC%3A46ABFF%3BT%3AEEEEEE%3BGFNT%3AAAAAAA%3BGIMP%3AAAAAAA%3BLH%3A100%3BLW%3A100%3BL%3Ahttp%3A%2F%2Fwww.wowwiki.com%2Fskins%2Fcommon%2Fimages%2Fwiki-100.jpg%3BS%3Ahttp%3A%2F%2Fwww.wowwiki.com%2F%3BLP%3A1%3BFORID%3A1%3B&hl=en

Lastly how would one get a custom error page within the wiki rather then the
server 404 page..  example - http://www.wowwiki.com/Cla