Downloading the patch is useless for the Underdogs version, since if you actually read the first post, the patch doesn't work. The question was, how can you (or just, "can you?") upgrade the Underdogs version of FS2 to 1.20, since the patch doesn't work. The Underdogs version is pretty chopped up, so the patch doesn't recognize it.
And SCP strikes me as kind of wonky. Its not exactly new-user friendly, and it has a huge list of checkbox "features" with little or no description making it impossible for someone with no experience to figure out what they want enabled. Oh yeah, and it messes up my options screen and the targetting stuff on the ship HUD is messed up on high resolution. Conclusion: SCP is scary.
And doesn't SCP have some problems running multiplayer? I tried hosting a game and it crashed. How does one get multiplayer support for FS2 these days? (Starting with the Underdogs version, which doesn't allow it, because its not up to date, and can't be updated.)