What's the best way to do this?

Ok this is going to be complicated to explain but here goes... OK I want to have my FPS player be able to pickup some dynamite, So far I have that bit worked out. But I want him to be able to use the dynamite to blast some rocks clear that will be blocking a pathway leading to the game level exit.

Now I'm not sure if it's best to just pile some rocks across the path and somehow have him plant or place the dynamite, set if off on a timer... Don't know how to do that???

Or to make a pile of rocks in 3D Studio Max, animate an explosion and somehow have the placement of the dynamite execute that explosion animation?

Dunno how to do that either???

in any event I'm sort of at a bit of a loss for a good way to do this?? I thought maybe even to just have it execute a cut scene... but have never done cut scenes and have no idea how to approach that sort of thing eigher...??

You see ideally, I would like my FPS player to be able to pick up 2 items needed to blast the rocks clear. First the Dynamite and then the Detonator or plunger box, you know that box-like device with the handle that sets off the dynamite. And have him plant the dynamite, move back a safe distance and detonate the dynamite using the plunger box/detonator... Not sure if any of that makes sense.

Any thoughts or ideas on a really cool way to do this??