I'm sorry, Bruce, but it doesn't work that way.
The computer isn't going to create a dual-boot system for you just because you connect a hard drive with Win98 loaded on it. That's just wishful thinking, friend!
Here are some links that might help you figure out how to set your computer up as a dual-boot. Whichever works best for you.
<A HREF="http://www.microsoft.com/windowsxp/pro/using/howto/gettingstarted/multiboot.asp" target="_new">Multibooting with Windows XP</A>
<A HREF="http://www.microsoft.com/windowsxp/pro/using/howto/gettingstarted/meandxp.asp" target="_new">Installing Windows XP with MS-DOS, Windows 95, Windows 98 or Windows Millennium Edition</A>
<A HREF="http://www.zdnet.com/community/stories/main/0,9057,2662085,00.html" target="_new">How to Dual-Boot Windows 2000 and Windows 95/98</A> (This article is also applicable for WinXP.)
Toejam31
<font color=red>My Rig:</font color=red> <A HREF="http://www.anandtech.com/mysystemrig.html?rigid=6847" target="_new"><font color=green>Toejam31's Tantalizing Tantric Toy</font color=green></A>
<font color=red>Second Rig:</font color=red> <A HREF="http://www.anandtech.com/mysystemrig.html?rigid=15942" target="_new"><font color=green>Toey's Dynamite DDR Duron</font color=green></A>
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<font color=purple>"Procrastination on your part does not constitute an emergency on my part."</font color=purple>