Create the directory structure in your home directory by unpacking the software distribution.
./i3d
/include
/lib
/bin
/man
/base
/assgn
/proj
/doc
/model
/pic
Make sure that you have your programming environment correctly setup. This include: gcc, make, lex, yacc, etc...
If you are using PC/Windows you should install the GNU programming environment.
Compile the software and run the demo.