Setting up VLAN for wireless guest access

[furby]

Hi,

Sure this is a common scenario but could do with some help as I'm getting lost.

 

I have setup two SSIDs (staff and guest) and given them separate VLAN ID's

 

I'm now trying to figure out how I assign different IP addresses to the seconds vlan (keep guests away from where they shouldn't be. I setup a new scope in the DHCP but clearly there's more to it.

 

Equipment.

 

Cisco WAP 321s (setup as cluster)

Win Server 2008 R2 - DHCP/DNS

Win Server 2008 R2 - Forefront TMG firewall and router