Can I include NSIS Bin in Installer GUI?

Hello,

i would like to write a simple installer gui for nsis.

Now my question what license i need to use for my gui?
Open-Source or close app?

Can i include only the bin files, or i need include all to legal in nsis?

Please i need some infos...

The license is very short, and basically says you can use it to do whatever you want as long as you maintain proper credit.