Question [Q] How to boot a recovery.img file AND custom ROM using AVD (Android SDK) ?

Good evening,

I am currently offering several SlimKAT ports (S4 mini and Transformer Pad). Recently i've sold those devices and still want to offer my ports for download.

There comes my Android SDK emulator questions :

-> HowTO test a recovery image out using it from command line ?
-> HowTO test a custom ROM out using it also from the command line ?
-> Is there a better way to emulate an Android device than the one offered by official SDK ?

NB :

-> I've already created an AVD config file for each of my target devices using the Android SDK GUI.
-> My OS is Linux Mint 17 x64.

Thank you for helping me out