Yes and yes. PPRNG is an Intel app, so you won't have any problem with it. But you might have other rosetta apps in your mac, check out this page. I personally did a clean install (more like clean snow leaopard install and then upgraded to lion) but you might want to check it out.
You can use the seed searcher from pprng and search for those ivs on that date. Once its done, look for the one with a matching date and parameters to the seed you want. Also, that frame can be anything between 14 and 20, I don't know exactly how the advancement occurs, I just know it happens from the breeding guide.
About the trade, if you could trade right now, it would be fantastic, though if you can't trade I'll just hook up with someone from simple requests (that sounds weird LOL)