Of course..1st things 1st....you are heading a little deeper into the pool compared to the shallow end where you should be. For a windows user...I know that this is like another world in compare.
1- just putting games on an sd card isn't going to work
2- using your n800 browser go to maemo.org...at the top there is a section called downloads in "Downloads" ...a button .."os2008" ...under that is a section for your os..."Games". Those are easy click on the install button....they install. Bam
3- researching the methods of properly installing and implementing game files for scumm ...deal with that last ...
4- if you want to put files onto your 1gb card....there is an easier way...a couple in fact....bluetooth is one. wifi transfer is another...but easiest for you is this:
a- put your sd card 1st into the external slot under the foldout stand
b- open the file manager
c- hopefully the file system shows the external sd card...(if it doesn't pull it out put it in your computer and format it with panasonic sd card formatter)....click and highlight the external sd card...then go to the top left drop down in the file manager window....format the card.
then the card should have no prob with compat.
5- pull out the pc to n800 connector cable you just used to flash with
6- make sure your nokia is on close the file manager...plug in the cable
7- your comp will find 2 areas...one is the sd card..click and open it..drag and drop whatever files/folders from your computer to your sd card...wait for it to finish...close window...ALWAYS MAKE SURE YOU PROPERLY SAFELY REMOVE USB DEVICE BEFORE UNPLUGGING THE CABLE. FORGET AND IT WON"T BE FUN FOR YOUR SD CARD.
8- Bob's your uncle
9-Remember to please post in the relevant subsection for your device/os/prob .. ...I can't help while you bounce around the forum subsections....it makes it difficult if not impossible for others who would like to reference and find out how a problem was solved if the question is in one forum but the answers are spread throughout many others.