Add files to installer after build

I would like to be able to add a license file to the setup.exe file that is createde by NSIS after the fact like through a ASP.net server. is this possable. or is it possable to compile the script from linux through Mono asp.

Dont nessarly need all the questions answered. the main question is can I add files to the setup.exe file that is built with NSIS.

Found The Answer that should work for me. it apears that there is a rpm for ubuntu, redhat, debin ect. for NSIS. I can edit the license file then package the file on linux with a mono asp page.