About networks with windows and linux

["eagle" <eagle mantrafreenet com>]

Hello!
I have a doubt hope you guys can help me out.
I am about install linux in a system which is going to be my server .
Through telnet all the clients (windows ) are going to communicate it.
Is it possible to have all the facilities( like Xwindows) to be made 
available to them or do they have to do rlogin.
I wanted in future to that the internet access be made through the linux 
serevr
The other network is of WindowsNT 4.0  and I want such that if a person 
logs into the network he must be able to communicate with both NT and 
the linux server and avail the facilities provided by them. Hope this is 
possible.
BTW I have Redhat 7.0 installed in the server.
I checked that the machines were communicating i.e, the clients( with 
windows98 SE as os) logged into the NT network are communicating through 
the telnet to the linux server but couldnt check for the Xwindows cause 
it was not installed in the server rather coudnt get it installed . 
It(the linux server) had 810chipset, 600celeron processor,  1MB shared 
vga card inbuilt into the board . It (Xwindows ) was not getting 
installled . Any way I have installed sis6326 so that it should work now.

thanking in advance .
eagle
^_^