No the gramaphone isnt heard outside of the sub so your ok with that
I know there are a lot of gramaphone music mods about
Jimbuna has a load on his gamefront site - link in his sig
Your error message is I believe because of starforce
How old is the SH3 disc ?
Newer versions already patched to 1.4 and are starforce free
There are starforce removal posts around on here which should help as well as links to a no dvd exe
http://www.subsim.com/radioroom/showthread.php?t=160118
No GWX and NYGM aren't compatible.
2 separate supermods in their own right.
As are LSH5 and WAC.
I have 4 installs on my comp - GWX,WAC and LSH as well as a back up stock one - always messing files modding so nice to have a spare
All supermods are different in their own ways and worth a play
I generally stick with GWX but if I see something I like in one of the others will have a go at porting it over.
Best of all worlds then.