WEFT is the tool to convert your font to a web installable resource. Then in your html page you have something like this:
<STYLE TYPE="text/css">
<!--
@font-face {
font-family: OCR A Extended;
font-style: normal;
font-weight: normal;
src: url(ocraext0.eot);
}
-->
</STYLE>
So basically you take a TTF font and convert it to a EOT file and store it on your web host and within your html you have a reference to the EOT file on the server.
When the page displays, it pushes the emmbedded font to your client IE browser.
Also take a look at the demos page:
http://www.microsoft.com/typography/...ng/default.htm
When displaying one of the demos, take a look at the html. It is pretty clear that your client won't have to install any fonts whatsoever on their system, or for that matter WEFT, because IE handles displaying the page in your chosen font!