when crysis 1 be available on xbox live. i hope that it will be at my location as well because most of games on demand games (not all of them) cannot be downloaded, It says: "this item is not available from your current location". can someone tell me how to solve this problem?

Go into system setting and change the Region or Location of your system to US & Canada Eastern Time . That should trick the marketplace into allowing you to DL games on demand.