Noob question on formatting on these forums?

Thank you kind sir! I think I got it now... my cheap example of iRule SNAT in progress...

when CLIENT ACCEPTED {
 if { [class match [IP::client_addr] equals "datagroup"]} {
 snatpool "snatpool"
 }
}

Pretty close. You don't technically need the quotation marks around the data group and snat pool names.

when CLIENT ACCEPTED {
    if { [class match [IP::client_addr] equals my_datagroup]} {
        snatpool snatpool
    }
}