yes!
yes, u can.

but why u need to install ZAPTOR　ａｌｓｏ？

bro, u cannot install both together unless your ride is a myvi or avanza (as tested)... other model you have to test first coz some cars really cannot fit two unit, it will cause more lag respond and heavy acceleration. Most  cars cannot fit 2 unit of Power booster & another brand of VS. So better test before any seller say "yess sure can fit".