cluster submission by hand / grid running

Dear MadGraph/aMC@NLO team!

I tried out the code and am now trying to get a large scale production running, ideally on the grid or a local (lxplus) cluster.

I have been looked at:
https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/GridDevelopment
but I can't really find where and how to get this gridpack.

So essentially, what I *can* do and where I can start from is the following:

I can generate the events in MadGraph
[e.g. generate p p > e+ ve [QCD] ]

I can get out from this by outputting the directory a tar file with the full amcatnlo code:
[e.g. output MYDIRECTORY]

then in MYDIRECTORY I find:
amcatnlo.tar.gz

untaring this, launching aMCatNLO I can get it to run to get lhe files

NOW:
I *could* just send off the amcatnlo.tar.gz with a job on lxplus and there run it with different random seeds (to be set in run_card.dat):

Now it is:
#***********************************************************************
# Random number seed *
#***********************************************************************
     0 = iseed ! rnd seed (0=assigned automatically=default))

But I guess, it would have to be changed. --> here I would need some input of how to set these random seeds.
[this actually would be very fine for me, since I have already a setup that would fully work with this]

(Best option of course would be, if I got the grid option to work, but for this, I really don't see how. *any hint would be appreciated* -- I could not find any information on the webpage, just the reference, that The gridpackage is what is obtained after a special run of MadEvent, with the twiki https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/MadEvent being empty...).

Thanks a lot
best
Kristin