Lost the installer CD, where an I download

I can't find any reference to the EMP-54, but there is a projector called the Power Lite 54c perhaps that's what you're referring to.

I found this link: http://www.epson.com/cgi-bin/Store/support/supDetail.jsp?BV_UseBVCookie=yes&infoType=Overview&oid=25721&prodoid=36478882&category=Products

If that's not it, go to Epson.com and select your country, then click on Drivers & Support at the top and click Projectors, just select your unit from the available products and your operating system and you can download the driver.