Where are you located?
What
N95 do you have?
What firmware is it running?
Please update, and correct your user profile to state this information so the community here can help you.
Where are you downloading your software/Themes/games?
If you have a RAR file, it will require unzipping to reveal the sis, or sisx, jar files, its these files you can either transfer to your
N95 by Bluetooth, or via drag and drop in PC Suite.
Some applications need to be signed, so make sure you search the forums for the relevant help, and advise on doing this procedure.