maybe you're good to have a coder doing the installation of the mods for you, making sure they all work as they supposed to...

there is a lot of people who even say they know how to do the installs but always report bugs that does not exists, just because they are not able to install them properly... i'm not telling that you are an idiot, i'm far from it... but tell me, when you can't repair your car, do you ask your mother or a garage ?!

also, about having the mods here integrated to the core... i can tell you that 75% of my old hacks were integrated to the actual core... because they were requested and useful... Googlemap is for me a gadget, or a widget someone can easily forget about as a useful feature...

having problems seeing hacks when you upload a skin is regular on this place, because you did not ask how to do it at first, and you did not check where you applied your hacks... yes there is a "not-written" rule about applying hacks, and if you navigate thru here or ask in the How-To forum, you will have that answer...:
1- use the Default Style as a placeholder for your hacks
2- import your styles as Child of the Default Style...
3- edit the needed templates that are custom to your new style, if needed.

... as you tell in your last post, maybe you need help, complaining will just give you some relief because you are frustrated, but the best solution will be to ask someone for help...