To install Pyramid, you can either extract or mount the .ISO installation file.

Following are tools you can quickly download to mount the ISO file.

MagicDisk is a small fast and easy to download and use virtual disk program.
here is a link to download this useful software:
http://www.magiciso.com/tutorials/miso-magicdisc-history.htm

Daemon tools lite is another tool.
http://www.daemon-tools.cc/products/dtLite#features

WinRar
An program used to extract the ISO file into a folder.
http://www.win-rar.com/download.html?&L=0