Hi scryptonite,
Yes you can do merged mining.
THEKEV VERTMINER:
-->
https://bitcointalk.org/index.php?topic=466867.0VertiKev/dmfree88guide.txt:
{
"pools" : [
{
"url" : "stratum+tcp://YOURMININGPOOL.com:3385",
"user" : "YOURUSERNAME.YOURWORKERNAME",
"pass" : "WORKERPASSWORD"
},
{
"url" : "stratum+tcp://stratum-us.backuppool.com:3384",
"user" : "USERNAME.WORKERNAME",
"pass" : "WORKERPASS"
},
{
"url" : "stratum+tcp://3rdbackup.com:3333",
"user" : "USERNAME.WORKER",
"pass" : "WORKERPASS"
}
]
,
"rawintensity" : "5120",
"worksize" : "256",
"lookup-gap" : "2",
"thread-concurrency" : "6336",
"temp-cutoff" : "90",
"expiry" : "30",
"log" : "5",
"queue" : "0",
"scan-time" : "1",
"device" : "0",
"shaders" : "1280",
"scrypt-vert" : true
}
It is a mechanism by which the minor will send to a variety of pools the hash generated.

PS.
It seems possible, even Vertminer.
vertminer-0.5.3/vertminer.conf:
{
"pools" : [
{
"url" : "stratum+tcp://stratum.vertco.in:8080",
"user" : "yourworker.1",
"pass" : "password"
},
{
"url" : "stratum+tcp://stratum.vertco.in:8080",
"user" : "yourworker.2",
"pass" : "password"
},
{
"url" : "stratum+tcp://stratum.vertco.in:8080",
"user" : "yourworker.3",
"pass" : "password"
},
{
"url" : "stratum+tcp://stratum.vertco.in:8080",
"user" : "yourworker.4",
"pass" : "password"
}
]
,
"intensity" : "13",
"vectors" : "1",
"worksize" : "256",
"lookup-gap" : "0",
"thread-concurrency" : "8192",
"shaders" : "2048",
"gpu-engine" : "0-0",
"gpu-fan" : "0-0",
"gpu-memclock" : "0",
"gpu-memdiff" : "0",
"gpu-powertune" : "0",
"gpu-vddc" : "0.000",
"temp-cutoff" : "95",
"temp-overheat" : "85",
"temp-target" : "75",
"api-mcast-port" : "4028",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "2",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "30",
"scrypt-vert" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"kernel-path" : "/usr/local/bin"
}