need your help please

Hi i explain me
I want to try to make a good tatoo for drew gooden
I have a folder with my iffset.exe
After decompress all when i tape iifset _x png....iff i have a folder with twelve icons
I transform the bmp with arm tatoo ect but now i'm blocked i don't know how to remake my iff with transformation
Please help me i'm very happy if i can try that
I wait your answer
Have a good time and happy holidays...
I hope you understand me i'm french and my english is not verry good