Okay finally, after testing the setup for a week, I can say Eureka! Making that "symbolic link was the answer. (MKLINK /D link target.. you can Google this command for more info)**. Now, all my components is loaded on network drive and being shared by 2 different Sketchup PC in our office.
Updating the menu is more efficient now unlike before that I need to copy manually from one PC to another whenever there's changes. The only downside I noticed (this is subjective) is the loading time of thumbnail on your menu- because I have tons of components on the menu (8GB), the thumbnails needs about a second or two to become visible unlike when it is saved locally- you'll see it right away.
So that's it, hope this helps!
**reminder when using MKLINK, first make sure that your "link" folder is non existent before using this- took me a long time of trial and error why its not working, it's because I first created an empty folder of same name- so don't do that, let the command create the link folder by itself.