1. I want to add some edited .TEMP files to the game, but I don't know how to. Particularly, the global data .brick file. Can you please help me out?

2. I wanna build/share some mods separately from my main mod collection. I tried adding "runtimefolder" to the flags.json but it didn't work. 

Thanks.

I assume you are building a content pack:

1. TEMP files go into the raw folder for chunk0 or the raw1, raw2, ... folders if you need them to go into a different chunk. You can register your file as global data by adding a TEMP.framework.json file with {"register":["global"]}. This causes the framework to alter the global data brick to include your TEMP. You should never edit the global data brick yourself, as that would cause massive problems on game updates and with other mods!
2. You can use multiple mod framework folders on the same installation of the game, the name of the framework folder does not matter (use different patch levels and remember to always update all framework folders on every change, from lowest patch level to highest patch level, resulting rpkg files only work together with all lower levels!). The runtimefolder flag is only necessary if you place the framework folder outside of your game's runtime folder, so it cannot find the installed game. The framework always reads from and builds to the runtime folder of the game.