Dreambox and Sky viewing card

[gud]

Hello!
I live in Norway and I have a Dreambox 7020S and Sky from the UK
(subscription through Insat International).
Everything worked fine until a few weeks ago when I got my new
Sky viewing card (white).
I tried to put in into one of my free card slots on my Dreambox, but it
wouldn't work. So I had to find my old Pace Sky box and put my DB aside.

I saw someplace online that I needed a cardreader which had 3,3V instead
of 5V which is in my Dreambox 2070S, so I ordered a OMNIKEY 3021 USB
cardreader. But here's a real problem.
I have only one free USB slot on my Dreambox and that is used for a
memorystick which contains some kind of programs that is needed
for me to be part of a cardshearing (Canal Digital and Viasat) through
a friend of mine.

So what do I do? Can I buy a USB port with several ports and put my
Omnikey cardreader and USB into that?

Then what? Will my Sky viewingcard automaticly work?

I do have to say that I'm a real amateur and far from a technical
person who don't know much about Dreambox. You could say that I'm
just a person who enjoy watching tv and hate technical problems
like this

I really would like feedback from somebody.

Kind Regards Mr T