local IP, hd file, two domains

[mvradio]

Hi, I would like to ask some questions
rightnow im useing Ubuntu 10 server

hmm, I have three questions to ask
1. I have a hub, and my server computer is local IP is 192.168.1.254
I can access my ISPCP thru WAN IP(the IP that goes out) 220.135.X.x
now, I want to know can I access it from the network useing 192.168.1.254?
I can only see
"Not Found
The requested URL / was not found on this server.
Apache/2.2.16 (Ubuntu) Server at 192.168.1.254 Port 80"
from my computer in my room.

2. Where is the ISPCP "user" ftp file located in the harddisk?
instead of uploading it to my ftp, I want to plug my USB hd in my ubuntu and just drag it in!
but I cant find the folder....

3.Is it possable to have one IP two domains?
I can have two domains that goes out, but actually it's the same server.
If I can have two domains is it possable to assign accounts to that domain, or is it just forwording?

Thankyou