Assuming you installed Dev-C++ 4 to the default directory of
"C:\DEV-C++" then all you have to do is unzip this file over
that directory with the archives default directory structure 
(usually the default unzip action). This archive contains all
the necesary files to use allegro V4 with Dev-C++ 4.

The examples are in the c:\dev-c++\examples\allegro4 directory.

Also included is the RTF documentation file , you'll need this!
Try adding it to your 'tools' menu.

Im using WIN98 with DirectX8.1 installed.

IF you have problems please post them to the allegro.cc
fourms. Or you can email me at:  thesuperdave@yahoo.com 

Please note this collection is bits and pieces of many works,
all free, but none written by me.

You need to put alleg40.dll in your windows/system directory,
or in the same directory as your .exe , also you need to link
to the alleg40.a lib under your project options, or you'll get
linker errors. Its in the lib directory.