Aftermarket dash guages

My son wants to install some new gauges in his '97 Civic HX. The gauges are similar to these: http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1,1&item 59041199&sspagename=STRK%3AMEWA%3AIT
What is he getting into? Is this an easy thing to install? Any thoughts would be appreciated. Thanks.
Mike
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