Best way to optimize

[gaurav.maniar]

I'm making an iOS game, it has 5 character and 60 small dress up images for each character, at a time only one character is displayed

how should i optimize image loading??
->load all images in UI2dSprite and put them outside the screen area and bring them to screen as required
->put all images in Resource folder and load the image when required (i have heard that, one should kept nothing inside Resource folder if possible)

[ArenMook]

I'd go with option #2 as you can then use Resources.UnloadUnusedAssets() to release them from memory after you're done using them.