So After Testing Ive got my list PNG YES DDS YES BMP YES JPG YES TIFF YES GIF YES JPF No (AND NO ONE USE JPEG 2000!!) PXR No PSB No
And after testing I realized that the unsupported formats dont get thumbnailed in windows explorer, so this was completely pointless XD, but its good to know, also I was Surprised that i wasnt getting error messages and having my computer go mad when I loaded an unsupported format, turns out i put a safe guard in without realizing it, good programming habbits that you complete forget your doing T_T.