I downloaded and installed both parts, and upgraded it to .61, the thing is that when I try to play any level at all, no matter what, it crashes to the desktop before fully loading a game.
Might be a problem with the 0.61 upgrade. See if you can uninstall it, and try downloading an other 0.61 installation (other download link).
remember that FH does not have any single player/co-op support
Yeah!! I'm sure it's your problem. Start a multiplayer LAN game. If you choose cooperative as your type of game you'll play with bots. But most of FH maps don't support bots. Download FHX minimod to have bots in some FH official maps. Search FHX info in FHX sticky thread at "Forgotten hope general discussion" section. See ya & have fun playing FH!!