maybe, but why don't you check out the first page carefully? the questions you asked could be answered there.
and let me tell you something, even though you get the major gear of alexi, u still can't achieve his tone.
there're many points you should notice. ex: the gain level of the mm04, the eq of the mm04, the suitable tubes for gp1000, the eq of your gp1000, the extra eq from multi-effect rack,and most important of all, never expecting your gp1000 will give u modern high gain, it's the 80s product, the sound is really not metal. only if you modify it.
and only the sound of ARE YOU DEAD YET is made by EMG H4, the former (except something wild) are all made by J50BC. If u only like AYDY, ok,that's fine. If not, getting the J50BC is a big problem. moreover, i don't think the gp1000 in normal condition is often available on ebay, it depends on luck.
so if u just like the modern high gain, highly recommend, just get the 5150 or Mesa or something like that, they don't have those kind of problems. After careful consideration, if u still want the gp1000, then you've better collect every components of COB tone, and be ready to face a lot of god damned problems and frustrations.
btw, I've been making Alexi's tone for over 2 years, and now I still can't achieve this goal. maybe until I get my gp1000 modified and 1936 cab, hopefully.