The &
ampersand isn't a shortcut or configurable hotkey, it's an accelerator key, which behaves that way (i.e. responds to the Alt key) at a rather low level, consistently across anything running on Windows.
No, you can't make accelerator keys work with the Ctrl key - the VBE has no say in that.
What you want is to assign a hotkey to certain IDE commands.. unfortunately the VBE doesn't allow configuring its hotkeys as far as I know.
You could write a VBIDE add-in (in VB6 if 32-bit-only is fine, or in .NET through COM interop for compatibility with 64-bit hosts) that enhances the VBE with such an ability though, but as the main project manager for Rubberduck (which does have configurable hotkeys for its own commands) I have to say that writing a .NET VBIDE add-in is a bit of a mine field. It's fun though =)