Search Bar for Netscape
1. Make a bookmark in your Personal Toolbar.
2. Install and use Googlebar for Mozilla. (Note:Any extension could corrupt parts of your Netscape installation, so back up before attempting.)
Also, see this extension at Mozilla Update. It appears that Version 0.9.0.20 "should" work in Netscape 7.2.
Change search engine Netscape 7.2 - NetscapeTool bar...
1. Edit your preferences to change the search engine.
Frustrated by Netsape Search
Add Additional Search Plugins
Internet search from the address bar in 7.2
1. Install a Mycroft project search plug-in.
Netscape 7.2 and search engines
1. Make this topic a "sticky."
Changing URL attached to Netscape "N"
1. I still use the old method of attaching the Google "advance search" url to the browser's throbber in the upper right hand corner of the browser window. It can now be done easier by editing the preferences files as mentioned in one of the above links.
Other should feel free to jump here to offer advice and guidance.