FVWM-crystal *** INSTALLATION ***

[vld_apo]

Can someone please help me installing FVWM-Crystal ?
Here is the web page: FVWM-Crystal: transparent desktop for your Linux box
Please explain it in very simple words, and no abbreviations, because I am really new to Linux.

Here is what I did:
Logged as root user;
unpacked the installation;
typed:
make install

and the installation happened, but I can not activate the new desktop ?!
in the web page says:" restart the X session and enjoy the new desktop"
what does it mean ?
Can anyone please try to explain how to install and activate the fvwm-crystal

[devils casper]

did make install throw any error?
Log out and click on Options/Sessions Tab. select fvwm-crystal from list.