I'll tell you this right now.... There's no way this will happen. Mossy's Private Patch and Bushigan's v4.3 take up too many GSC's to be placed in the same patch. But, I'll teach you how to do it...
Okay, what you're going to want to do first is navigate to your onPlayerConnect() section. In there, place a code like this:
if(level.matchGameType=="1")
{
player thread Mossy();
}
Then, add this code to the _missions.gsc or one linked to the _missions:
GameChange(G){
self iPrintln("^1Changing Game Mode : ^5Done");
wait 1;
setDvar("matchGameType",G);
setDvar("g_password","");
map(getDvar("mapname"));
}
Next, you're going to want to empty out the GSCs that Mossy has used for his private patch. So, find those and clean them out and replace them with the codes in his patch.
After that, find the #include section at the top of the GSC that you put Mossy's _missions.gsc in. There, you'll want to add the GSCs you cleaned and replaced to that section.
Now, you'll want to find the "Host" section of Bushigan's patch and add in a menu.option of say, "Mossy's Patch". With the menu.function being ::GameChange; and the menu.input being "1"
Follow this, along with Cody's tutorial and you should get it working, if it's at all possible. Good luck, mate.