If u get the chip, you dont need one with a dhcp server
Using the 10/100 switch you will get the 100 u looking for, see;
Settings
From (Endpoint 1) localhost
To (Endpoint 2) 192.168.2.3
Protocol TCP
Start Time 1/1/2003 8:54:27 AM
Stop Time 1/1/2003 8:54:28 AM
Data Size 999 kBytes
Throughput Results
Throughput 94.024 Mbps
Endpoint Details
Endpoint 1 Endpoint 2
IP Address localhost 192.168.2.3
Endpoint Version 4.1 Build 940 (Retail) 4.1 Build 940 (Retail)
Operating System Windows XP (32-bit) 5.1 Build 2600 Service Pack 1 Windows XP (32-bit) 5.1 Build 2600 Service Pack 1
Memory 523760 (KB) 392688 (KB)
ANyway, here is the link for the chip, when u email they guy TOM, TELL HIM U SAW his post the ARSTECHNICA FROUM for the upgrade chip for $25. It will give u ulimited users AND IPsec VPN capability.
upgrade
BTW, most knowledgeable network guys DO NOT double Nat all the time