How can I make my bootstrapped install as simple as possible?

I'm using WiX to create an installer and generate a bootstrapper. The bootstrapper comes out as a separate file that 开发者_开发问答does its thing and then executes my MSI installer. I want to make this process as simple as possible. I don't want the user to have to unzip files or anything, I'd like to them to just be able to download and double click a single file.

Can this be done? If so, how? If not, how simple can I make it?

OneClick is not an option, as my app is service based.

See this question on superuser.com. This guide looks very clear. Basically you will use 7zS.sfx to create a self extracting archive which will automatically be extracted, your setup.exe will be run, and all files removed afterwards.