ok i have a second hand (from amazon) n800 arrive today along with two new 8 gig class 6 sdhc cards

i pluged the cards in one internal one external and booted it up
i downloaded the fm radio tuner and varios other stuff
i pluged it into usb of my laptop and got both cards displayed...
neither have the aps
one has a folder labled .apt-archive-cache
so i go a hunting
seems they have all installed into the device small flash ram how can i tell it to move the apps to the memory card? and how can i install by default to the internal memory card?

please note im a windows user so if the method is terminal based please go slow and step by step lol

thank you in advance (im down to 100megs and still have loads i want to add!!!!)
also i read that you can add repositiories to the device which give you more to download can someone point me in the direction of the essential ones