License question

[Roob]

Hi guys and gals.

I'm developing an application, and I can't use NSIS as an installer because it's too limiting.
I'd like to create a custom installer which looks and feels like NSIS, as it's familiar to users.
My question: can I use the texts and icons/images of NSIS in my installer?

The project is not opensource. It's not commercial, but this might change in the future.

According to my understanding, NSIS is licensed under the zlib/png license, which permits such usage, but I'm asking here just to be sure.

Regards.