scripting module making & installing
 

Making modules after a kernel build takes forever. Installing them takes a while too. Can I script these in bash like this:

make modules
make modules_install

The above can be called modules.sh and executed like this:

chmod +x modules.sh
sh modules.sh

Would this build & install my modules?

Before run the make command, be sure your script is executed from the kernel directory
Maybe add something like :
cd /path/to/kernel

..at the top of script
You can run :
make modules && make modules_install
at command line as well

Do error messages during the module making get logged? If so, where?