We have a good procedure to allow a downgrade via RUU, which then allows you to use the other root methods again.
Big thanks to Joeball88 for putting in the testing time with me to get the bumps all smoothed out, and for caska who had the epiphany that we should goldcard it before RUUing.
THE SCRIPTS HAVE BEEN UPDATED MANY TIMES! Please be sure to re-download the new hack4legend-v5.zip before you start if you a returning root seeker.
You will need adb access. Install the android sdk for your platform (macos, windows, linux) get it for your OS here.
If you don't know how to install the sdk, search xda, there are a ton of howtos for that.
*updated files to hack4legend-v5.zip @ 7-19-2010 11:35AM Central*
Preliminary things to do.
RUU 1.31 for Legend
Make a goldcard, these instructions work, but you have to change mmc1 to mmc0
Another goldcard method if the first doesn't work for some reason.
Get the Android SDK (skip if you have a working adb)
Have adb in your path, or move the files contained in hack4legend-v5.zip into your sdk/tools directory so your pushes will work properly.
FOR ALL OS's Make sure your phone has Applications->Development->USB Debugging turned on.
Do NOT have your phone in Disk Drive Mode, have it in Charge Only.
Open a terminal window in your /tools/ directory. Type this at the prompt.
You WILL see several error messages.
Look for this line, if the crwxrwxrwx matches you are ready to downgrade
crwxrwxrwx 1 1001 2002 90, 0 Jul 19 16:19 /dev/mtd/mtd0
c---rw---- 1 1001 2002 90, 0 Jul 19 16:19 /dev/mtd/mtd0
Power cycle your phone.
If you have trouble, clearing your phone to factory defaults may help.
Put your goldcard in.
You can now downgrade to RUU 1.31, run the RUU_Legend_HTC_WWE_1.31.405.5_R_Radio_47.26.35.04_ 7.05.35.26L_release_126592_signed.exe that you downloaded earlier.
After that you can follow the other root howto's for the Legend!
caska says this link is faster for the Legend root download.
If for any reason you want to put your old ROM id back in after you've ran crackin, but before you run RUU run uncrackin and it will reinstall your old ROM version number.
If you really love me and want to say thanks, donate some beer money.