im looking for a mod that will allow me to conjure an unlimited number of creatures at the same time!
Doesn't exist. This allows twelve: http://tesnexus.com/downloads/file.php?id=16967
and "You too can actually specify the setting in your game through the console. Just open your console using the ~ (tilde) key and type in "SetGameSetting iMaxPlayerSummonedCreatures, x" where 'x' is the number of creatures you wish to be allowed."
However, a lot of summons will kill your computer, and each summons has to be a different creature/spell.
There are some mods that allow summons of multiple creatures at once, they may be useful.