Joy,
              _______________________
             /                                |   o  |
<front    /                    Hinge > |       |   back of van >
            \                                 |       |
             \_________________  | _o_ |

The pedal should have a flexible area which acts as a hinge.  The
shorter peice should be attached to the floor with two rivets.  You
can kinda pry the carpet out of the way without damaging it.  If the
end of the pedal toward the back of Matilda has two smallish holes (a
bit smaller than 1/4 inch), then you simply need to reattach the pedal
to the floor, a piece of cake if you have ten foot arms or a friend
who's willing to get under the van for you.  You'll need to drop the
spare tire, move it out of the way, and lay your red head on the spare
tire carrier.  The accelerator linkage is contained in a small (ca.
1"x1"x5") white box.  If the pedal is still attached to the linkage
you do not need to drop this box.  The pedal attachment holes are a
couple inches behind this box.

I went to Home Depot and got 12-24 x 1" (I think 1/2" would work)
screws and appropriate washers, and nuts, fed them through the pedal
and floor, and ran the nuts up on the screws from beneath.  Steph held
the screwdriver from above while I tightened the nuts from below.
Only took a half-hour or so.  Still fresh in my mind since we did this
last weekend!

If the pedal is torn at the rubber hinge, you'll need to replace it.
As a temporary get-you-home measure, I would probably try to find a
piece of leather and use contact cement to glue across the broken
hinge (probably last a few weeks).  My guess is that you just lost the
rivets.  If you need help, send me a ticket and I'll be right there.

Love,

Karl