I took it back to Firestone. First they said, no we did everything right.
Then I told them that they just need to loosen all the mounting bolts, shake
the engine a little and then tighten the bolts to the specs. That is exactly
what they did and vibration came under control. At least this is what they
told me what they did. Before I picked up the vehical they called me to tell
me that the whole engine diagnostics need to be done to remove all the
vibration because there is misfire etc etc. There may be a little but that
misfire was there prior to changing the mounts as well. I did not ask them
to quote anything. I think most of the vibration is now gone. I will myself
look at the misfires.

I just took it to them the first time because I wasn;t comfortable doing it
myself. Anyway, seems  like it is OK now.

Thanks everybody who responded. I just recently started reading this
newsgroup. There are a lot of helpful folks who frequent this group and that
is really cool!.

-Paul