You need the -gp option on the stratum proxy, so each one is listening on a different pool.
mining_proxy.exe -o pool1 -p port1 -gp 8332
mining_proxy.exe -o pool2 -p port2 -gp 8333
Configure your pool1 blades to Ports 8332,8332 and the pool2 blades to Ports 8333,8333
I had a setup exactly like that running for a day earlier this week, mining for a friend; two stratum proxies on the same machine pointed to different pools.
Hello, I had a question if you don't mind. (or anyone else)

I've types in the below but I seem to get an error. Am I doing this right?
C:\miner\mining_proxy.exe -o stratum.bitcoin.cz -p 3333 -gp 8332
C:\miner\mining_proxy.exe -o eu-stratum.btcguild.com -p 3333 -gp 8333
A deprecation error? I'm new to this stuff, slowly getting my head around it all.