Understand Brother wireless printers installer (Driver Install Tool)

I would like to install printer and scan drivers for Brother wireless printers on linux distro (no matter if dpkg or rpm based) without installer Brother supports ("Driver Install Tool"). Therefore I'd like to understand the installer to perform only necessary steps. Printer, scanner and fax drivers for Brother printers as well as the Driver Install Tool can be downloaded from their site (e.g. MFC-L2730DW ). I tried to read the installation script and it looks like it does at least: * install udev rules sample for Brother MFP (/etc/udev/rules.d/${number}-brother-libsane-type1-inst.rules) * install libusb-0.1-4 if not available * detect printer and scan * install some script dependencies (mawk for Debian) * in the end runs wget and dpkg -i --force-all (for Debian/Ubuntu based distros) or rpm -ihv --nodeps --replacefiles --replacepkgs (for rpm based distros) Could anybody describe what exactly the script does step by step? One can decide what are the necessary steps.