Grenades and timing, dont forget the mini's Options

[SirKalamon]

I have a question that that the main rulebook could not clarify, or atleast i could not find my answer in it. My question is this, can a player choose to set the timing to be on impact so that if the grenade is thrown it is resolved in the same pass? The problem is that under timing of grenades on SR3 pg 118 it states that grenades thrown explode in the throwers next initiative phase,however, on pg 282 of the SR3 it states that grenades may be set to explode on impact or have a range of timing that of 2seconds to 2 minutes. Now on pg 118 under timing of grenades, are the rules represented there are for the 2 seconds that a grenade can be set too or does it just really mean for grenades set on impact?Also do minigrenades work exactly as thrown grenades or do they just simply explode when it reaches its target?