Ok, I think I have it nailed down. The tricky bit is how to make SuperSU stick after you remove the chinese client, as sometimes you will lose root access after reboot. But without further ado, here it is.
Sheep's Sony F series rooting guide:
1, turn on developer mode under System settings -> Developer options -> USB debugging.
2, download and install Vroot here (http://www.mgyun.com/vroot).
3, Run Vroot, and connect your Sony F series DAP to your computer.
4, Click the lower green button to start rooting.
5, Rooting in progress, DO NOT disconnect your DAP.
6, Rooting successful. At this point you can choose to keep the Simplified Chinese Root Manager, but read on if you want to replace it with SuperSU English (multilingual actually) client.
7, Optional, delete the Baidu Message Board client (bottom right).
8, Disconnect your Sony F series DAP from the computer, and go to Google Play, search and install SuperSU, ConnectBot, and Root Browser.
9, Run ConnectBot, choose to set up a new local host, and give it a name.
10, When you run the session, the superuser manager will prompt you for permission (right is yes, left is no.)
11, Click on the right side to say yes (of course), type in "su" no quote, enter, and if you see the # sign then you are rooted.
12, Here is the tricky bit with SuperSU, but follow along and you should be fine. Click continue to keep running SuperSU.
13, This is the confusing bit, I tried both Normal and TWRP/CWM install but sometimes it won't stick after removing Vroot and reboot. But here is how I got it to stay. First choose "TWRP/CWM"
14, Get another root access prompt from Vroot, click right for yes.
15, SuperSU will run and should be successful, technically it will try to reboot but only kick out to the home screen, but this is fine as you will have to rerun this again after you stop Vroot.
16, Go to Manage apps -> select running -> then click on the Vroot app with the blue shield and stop it.
17. Go to Root Browser, somehow you will still get prompt for access like above, access the system/app directory, and delete the superuser.apk dir by holding it down for a sec.
18, Go back to SuperSU, and rerun it with the same setting as before, but this time it should reboot itself.
19, If you do everything right and still have root, when you run ConnectBot again with the "su" command, not only you will get #, but you should see a different prompt in English from SuperSU instead.
20, You have now successfully rooted your Sony F series DAP and replaced the Simplified Chinese Root Manager with SuperSU. Enjoy.
Note, you might have to run Root Browser at least once before stopping the Vroot, and I might have mis-ordered some of the steps in the middle. If you lost root it is no big deal, just run the Vroot client from your computer and root again.
Edited by DrSheep - 9/1/13 at 3:27pm