Pool/Scope or subnet with PXE boot options?

[Jason Gerfen]

I am not sure if this has been addressed before or not as I could not 
find anything in the archives or references (minus utilizing classes) to 
allow an entire pool/scope or subnet to a pxe group.

Would it be an options within the pool options? Something like:

pool {
    option domain-name-servers 155.101.115.10, 155.97.15.2;
    range 155.97.14.1 155.97.14.210;
    allow boot-clients;
    #bootp specs
     filename "/tftproot/pxelinux.0";
     next-server server.name;
}

or perhaps something like this within the subnet declaration?

subnet 192.168.5.0 netmask 255.255.255.0 {
    option domain-name-servers 192.168.5.2, 192.168.5.255;
    option routers 192.168.5.1;
    option ip-forwarding off;
    #bootp specs
     filename "/tftproot/pxelinux.0";
     next-server server.name;
}

I really want to avoid the use of classes here as I would simply like to 
allow our dynamic IP ranges the same group bootp access as our static IP 
ranges.

Any help is appreciated.

-- 
Jas