I've done the root using the process described here... and while I'm not positive, I think there may be some deficiencies with the batch file. I do have root. But, I don't think everything is working just right. Whichis a bummer, 'cause I don't have the knowledge yet to know what I need to fix. I have a friend who knows rooting well, and I'll talk to him tomorrow... so hopefully I'll get that straightened out.
I did find sort of what you are looking for... a how-to. Try this link and follow the Newbie instructions. Download the pdf file and follow it to the 't'. Think you'll be ok. You will need to run 7-zip in order to unzip the file though. I had to go download and install it... easy enough. Just google it.
Here's the link:
[HOW-TO] Root Xperia PLAY (& many more phones) v2.2+ (zergRush Method) - xda-developers
There's still some things in this pdf that I would 'fix' it it were up to me... and some things I'd change, but, I think it should bring you smiles.
First, I'd go through the whole document, and download all the stuff that he tells you to download. He gives you links. Make sure you go through the whole document, step by step and try to understand what each step is doing. Then, go ahead and start after you're comfortable that you're ready.
You will need to do two things that aren't clear from the pdf at the beginning. First, you need the USB drivers for the SGH-t759 (Exhibit 4g). I suppose you can use the link that is provided by webguy82 in reply #5 of this thread. Install them. I, instead, installed Samsung Kies, hoping that I might be able to make a backup of things from my phone before I started... but no joy. Says Kies doesn't work for this phone. Think that's wrong. But, it installed more current drivers than the link from webguy. It probably doesn't matter, though. And, a cursory comparison of the old and newer drivers didn't find significant differences. So, probably easier to just install the 'tether' drivers.
Then... and I'm not sure if this in the pdf or not... make sure you go on your phone to menu-settings-applications-development and check USB Debugging. That's a must do.
You can then connect to your computer via your USB cable and start the process in the pdf.
When you finish the process, and you exit from the command line... and your phone has been rebooted... wait for it to completely boot... then unplug from your computer and go and uncheck the USB Debugging.
You should be good to go.
I downloaded a free program from the market called Root Check... Install that, click the Verify Root Access button... Then the SuperUser app will popup, and before the countdown reaches 0, click Allow. You should be all happy.
All for now. Let me know if you have further questions. I'll check back here Saturday morning and late Saturday evening. And, maybe later tonight, too. Depends how I'm feeling.