There is a problem with the latest version of hamachi where you wont see the server in the list, try downgrading to 1.0.1.5 as this was the last version where this problem did not exist. Also when searching for your hamachi server make sure that you use the 'LAN' tab in the in-game server browser.
As I said the '***NETWORK TROUBLE***' being displayed for a around a second while in race is a known bug. If you need help with your script then refer to the specific topic where you asked for assistance.
A resource folder is the repository of all your resources for your server to be used on MTA. The default root of the resource folder is C:\Program Files\MTA San Andreas\server\mods\deathmatch\resources.
There was an interior resource but I believe it was removed for a reason I'm not sure about but you cant add the possibility for the player to warp from one place to the other from the map editor, it must be done through scripting.
This is exactly why there were never checks for the handling.cfg file. MTA wanted to implement the possibility for the server to either use their own modified handling or use the original handling to restrain cheaters.
Is this the router manager or something? Cant figure out what they are exactly. Configure the server settings through the mtaserver.conf file located in C:\Program Files\MTA San Andreas\server\mods\deathmatch (default). Note: leave the IP entry left out in mtaserver.conf since it automatically retrieves the right IP for you.