Another noob question from me.

I got the FPSC Segment Kit (for making custom Segments) and I got a JPEG I took of metal for a metal texture for a floor segment I turned it into a TGA file with DDS Converter 2 and when I tried to use it as a texture it didnt have it in the selection screen then when i dug deep in the files with the two textures it came with. they had 3 files. Example: F_A_01_d.tga,
F_A_01_d2.tga, and F_A_01_N.tga and mine was only Metalfloortexture 1.tga. Can someone help I need it And sorry for all the noob questions
YOU DARE BRING LIGHT TO MY LAIR, YOU MUST DIE!!!!!!!!!