Pokemon Diamond Help Please

Ok, so, I've been wandering aound the world for some time, and I need to know, how the frig do I get to Eterna City? Please someone tell me, or, point be to somewhere that can help, and spare no detail. Right now, I'm in Floworoma City, if that helps, any help would be nice

In Floroma city.... while in the city go to the left and there should be an exit then you have to go to the winworks!

if this didnt work or you need moer info just send me am email

Ok, please Mods, don't close this yet.

Ok, so, I've done everything in Eterna City and I'm on my way to the Mt. Coronot, or whatever it's called, so how do I move the bolders blocking my way? It's comes up and says "these bolders could be moved by Pokemon" so wtf do i do?