I am a little confused.
I have used AutoSPInstaller without making but a few changes.
First of set provision to false for all of the server features.
The services you can leave on are:
Remove the WebApplication MySiteHost element.
Install SP Foundation binaries manually and also install Search Server Express binaries and then run AutoSPInstaller.
Maybe a few other tweaks but you end up with a foundation site with a nice search configured