When you use the Sequencing SAR component you can configure it exactly for your needs. Use latest Creator 4.0 SP1
Hmm, it doesn't seem to solve any of my problems: it can't have the same analog IO pin connected to many of its inputs the same time as the regular hardware AMUX couldn't. It merely looks like a wrapper hiding the AMUX, ADC and indexing logic in a single black box, but without any added analog capabilities. ResourceMeter indicates that it also steals 2(?!) DMA channels and huge amount of UDB resources. I use PSoC Creator 4.0 Update 1 (220.127.116.112).