fhotoace
Without a sample image, it is hard to know what you mean by "this antique photo effect" All I can guess is you want to convert your RGB image file into sepia. Most photo programs have that ability. Just remember to save the converted file as a new name so you do NOT overwrite your original file. Use Yahoo Search to find the tutorials you need to make that retouching conversion

Gillygems
Apply a sepia filter plus a noise filter in an image editing prog.