If you're just testing modules out, you should be able to use
modprobe <module> and
modprobe -r <module> to insert and remove modules from the linux kernel, respectively.
rmmod should also perform the same functions (inserting and removing).
It sounds like you're looking for the
mapping directive in
man interfaces for details on how to alias networking devices. Note that terminology-wise, an "alias" is a second, third, or otherwise additional IP for an IP device, resulting in an interface with multiple IPs. A "mapping" is used to map logical interface names (
ifconfig LOGICAL_INTERFACE up) to real interface names.