Question : DHCP - SUPERSCOPE

The more i read the more confusing is getting. I thought that i should ask the experts.
My problem might be simple but I am new in this subneting.
I have a win2k3 server as a PDC and ... DHCP.
Looks like we  will run out of IP's sooner that I expected.
until now I had only one scope: 192.168.1.1 to 192.168.1.254, gateway is 192.168.1.1(sonic)
I am about to create another scope and assign 192.168.2.1 to 192.168.2.254.
Also I was reading that is better to have the SUPERSCOPE created. questions now
How will the pc's from the second clas 192.168.2 will comunicate with the ones from 192.168.1. , including internet browsing and all the other stuff ??
Do I need another router betwen them ?
Can I use the second NIC that I have on the server ?
Thank you

Answer : DHCP - SUPERSCOPE

Your current subnet is 192.168.1.0 with a mask of /24 (/24 = 255.255.255.0).
 
You can just change the mask on the router from a /24 to a /23 (from 255.255.255.0 to 255.255.254.0)

This would make your subnet go from 192.168.0.1 to 192.168.1.254 (510 addresses)