If you don't want to wait for the upcoming CoolRunner 3 -and have the right tools- Team-Xecuter has released an useful tutorial outlining the process to glitch 16MB Corona's using a CoolRunner or any other standard XC2C64A based glitch board.

According to T-X:


It's still RGH2 based and is no where near as good and fast and reliable as the CoolRunner 3 / RGH3 – but for those that want to have a play until then, you can easily do a DIY upgrade by adding a 48.000MHz crystal.

A NAND-X or JR programmer v1 can still be used to read/write the 16MB NAND.

The pic shows a Rev A, we're just putting together the info for the Rev B and Rev C too and will get all of that code and parts info posted shortly.
See our forums or the official source for the full tutorial, if you want to give it a shot.

News-Source: Xecuter DIY Corona16 Coolrunner free upgrade (via) Team-Xecuter

http://www.xbox-scene.com/xbox1data/...AFNlLeJpGE.php