Ubuntu Core's wiki page page contains the instructions to install Ubuntu Core on a target media:

1. Uncompress (do not unpack) rootfs
2. Format target media: at least one partition should be ext2, ext3, or ext4
3. Unpack Ubuntu Core to ext{2,3,4} partition
4. Install boot-loader
5. Install Linux
6. If the Linux kernel requires modules, add these to /lib/modules/$(uname -r) in the ext{2,3,4} file system
7. Boot the target device
8. Install any additional required software using apt-get

But what are the specific commands to do the above? The things I'm specifically confused about are:

1. Uncompressing and unpacking, what's the difference and how do I do them?
2. What package should I install if I want the generic kernel provided in regular Ubuntu installation?
3. I won't be installing any drivers or anything related to kernel other than what's provided in the repos, do I need to worry about manually adding kernel modules?

PS I would like to request that all the commands used in the installation process be mentioned in the answer, for the benefit of ones who're completely unfamiliar and myself, should I ever forget.