The RAM has a clip on either end. Press out to release installed RAM. To install new RAM press into the board until the clips lock themselves. Sometimes this requires doing one side at a time depending on how much room you have for two hands etc.
The AGP card just slips in. You need to remove the rear panel blank where it will exit the case and then there is a screw to secure it to the case.
There are some details in the manual:
http://www.fic.com.tw/support/downlo...ip&info=manual
If you have any problems we can dig up more tutorials for you but this is rather simple.
You should read this if you are not familiar with working inside the case:
http://www.d-a-l.com/articles/library/72.html