Disclaimer: Any mod presented in this thread may or may not violate your warranty contract with your manufacturer. Proceed with caution!
Bplus seems to have discontinued PE4C v2.1. That means that there is currently no pnp hardware available to achieve the x2.2 link. here
Check the newbie guide for all the tweaks on the E6430 by badbadbad...
NEWBIE GUIDE TO TWEAKING THE DELL E6430
...or below for