To make a ini file is quite simple, it's enough use a normal notepad editor and write these few lines:
[info]
name="Title name"
path="/gamedir/game.gpe"
icon="/gamedir/icon.png"
title="/gamedir/titlebar.png"
The "gamedir" is the game/app work directory (obviously this is different for any game/app);
similary "game.gpe" is the name of game/app executable;
The "txt" file made with notepad it must be saved as "titlename.ini".