Converting a InstallShield MSI/Project to NSIS

Question

I have an MSI built with Installshield. I want to decrease the size of the MSI, so I was looking at other options. It seems like NSIS has LZMA compression which is better than whatever is used by InstallShield. Is there an easy way to convert my MSI or InstallShield Project to a NSIS (or any other installer with Better Compression) project & build it.

Answer 1

Are you looking for some tool or utility?

There is nothing like that.

Only way is to rewrite advanced features of your MSI into NSIS manually (but the basic skeleton of installer - pages, files, shortcuts, registry keys, ini values, ... can be generated by enclosed Wizard).