I'm having troubles with reinstalling lion from Recovery HD

Hello everybody. Please keep in mind that I'm not english, so I'll probably do some grammar errors.
Here there's my problem:
I decided to reinstall Mac OS X Lion, on my macbook pro 15" (late 2010). Everything worked well, I just wanted to clean everything and start over again.
I started the computer from Lion Recovery HD, which is, as we all know, in a separate partition.
I followed the instructions written in the documentation: I initialized the Hard Drive with a HFS+ file system from the utility disk, then, I clicked on "Reinstall Mac Os X".
After choosing the right HD and writing the username and password for the mac app store, i got an error: my account is allowed only in the Italian store (I'm from Italy, but I'm temporarily in the USA. I also wrongly forgot my Snow Leopard DVD in Italy )
Anyways, after clicking OK and writing ID and PWD again, the download of the OS finally starts (First problem solved?)
After more then 15 hours downloading, I came home but it didn't change a lot: the computer was still on recovery hd (i think it restarted by itself?), the download was finished, but it didn't install the OS, nor I could boot from the main HD. If I try to click "Reinstall Mac Os X" again, it would ask for my id and pwd again, and start the 15 hours download another time, as nothing had happened.
By the way, i checked the HD from the utility disk, and about 4 GB are used in the HD, while before the download I had initialized it, so I think Lion was downloaded there. I repeat, I can't startup from the main HD, since it's not available when I turn the computer on and press option.
Sorry for the long message, but I tried to give you the most informations I could provide. If you need other informations, tell me.
Thank you very much for the help, by know I'm stucked on a $2000 machine that has only Safari on it, with the scrolling that is in the wrong way
Alefus

Not sure what happened, but I think your best bet it to try again.

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