http://forums.maxconsole.net/showthread.php?t=37195 for original post by FWI member JamesBDX, who figured this method out.
if you want to permanantly flash a 3.00/2.71 se-c hybrid w/ 3.00 vsh and visualizer, and possibly more, and still have access to homebrew, umd's and _so's, check the above link
some homebrew will need to be patched to work just like w/ 2.71 se...see this link:
THIS IS NOT FOR THE IN-EXPERIENCED, IF YOU DO NOT FOLLOW INSTRUCTIONS OR DO STUPID THINGS YOU VERY WELL CAN BRICK.
T H I S I S N O T S A F E F O R N E W B S.
but cheers ;)