Is it possible to add the functionality to press key combinations (Extra Keys + Modifiers)?

I often need to type various combinations, e.g. Shift+Tab (for reducing indent in my editor), Ctrl+Home/Ctrl+End (for jumping to file start/end), etc.

Rebinding the keys is theoretically possible, albeit not preferred since i can't change the bindings on the servers at work, and having differing keybindings on private and work environments is prone to errors.