Hey,
About a year ago i had messenger with script or add-on that give me the ability to add emoticons as big as i want, i could choose there what image i want to insert and then her size and i was inserted.

Where can i find this again ?!

10x

Mate I think you are talking about a plugin no a script.... and that plugin's name was Stuffplug NG... this plugin no longer exist... but there is a new version of it called Stuffplug 3 (in beta stage) but isn't a plugin of Messenger Plus! anymore... is a standalone program... the only problem is that the function you wanna use isn't available anymore... cause isn't posible... visit this page to know why (search the forums there is already a thread of it)...