You can only do one Quick Call alert on one channel. Each quick call allows 4 tones. My system where I am is a 2-tone system with a common B tone for fire and ambulance, so I need 3 tones for my company's alert. If you have a 2-tone system and want two companies tones, you can do that, provided they are all different tones (or share 1 common tone). If you need more than 4 individual tones, you cannot put them all on one channel.
Does that make sense??
In order to do the voice storage, you have to have that added to the actual radio (called an option board) before you can activate it in the CPS software. If you already have that, each conventional personality should have a voice storage feature.