I've never run across this many incomplete questions in one night.
Open an attachment in what program running under Windows 98? Why are you running 98 anyway?
win 98 is a client whereas win NT is a server..
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you need internet connection cables
Unfortunately, no.
a attachment is when ur sewed together
Win 98 is newer than win 3.1
Yes, you can.
You need to install the Novell Client software for Windows 98
Distal
When an end user sends an email from a Windows Exchange or Outlook client, a file attachment called Winmail.dat may be automatically added to the end of the message.
You can ask a friend - who has windows 98 - to make one for you
you will have to do a fresh install of Win XP, this will get rid of all remnants of Win 98, don't forget to back up your info!