Q:

How can I use multiple icon size in same wizard?

How can I use multiple icon size in same wizard?
I have 16x16, 32x32, 48x48, 64x64 and 256x256 icon's size and I want to know if i can use them all in nsis?
To use as small, medium and large icons. If I change the view in windows explorer the icon of my setup becomes distorted.  

A:

A Windows icon can contain multiple images with different sizes, your icon should ideally contain 16x16, 24x24, 32x32, 48x48, 128x128 and 256x256 pixel images. 
You need to use a icon editor to create the .ico. There are multiple free icon editors and converters out there...

