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a. You choose to use a font embedding technology. Microsoft have their own and you can find out about it on the MSDN site. Only works in IE though.
b. If it's just for small sections of the site you could build graphics on the fly using a copy of the font on your server. You'll need access to a server-side language and the appropriate graphics library for this. For PHP you'd use GDLIB.
c. Offer the font for download on your site! This approach used to be quite common in the early days of the web.
There could be copyright issues with all of these approaches. To be safe, contact the font author to ask permission.