Okay, here's my attempt at a quick guide for doing this. Disclaimer: I have not tested this (my phone is already rooted), but these instructions should work. I'm not responsible for any bad things that happen, but I hope they don't.
If you want to just give root access to your current phone, you need to do three things:
1. First,
download XDA's jcase's engtools3.zip file and place on the top-level of your phone's /sdcard (MD5 sum:
ba944bbb80c8e1290f237429b8130f83 *engtools3.zip)
2. Second,
install a custom recovery partition (usually Amon_RA's)
3. Third,
flash jcase's engtools3.zip file to give you root access via su and SuperUser.apk
========================
First, get the
engtools3.zip file created by jcase over at XDA (download from
Multiupload.com - upload your files to multiple file hosting sites! per Nestor's post:
http://androidforums.com/all-things-root-eris/121660-root-without-rom-yet.html#post1136379) and place this on the top-level directory of your /sdcard. You can download it directly from your phone or copy it from your PC.
========================
Second, you need to get a custom recovery partition (usually Amon_RA's) installed. You can do this by either:
A. Following erisuser1's
http://androidforums.com/all-things-root-eris/127861-universal-eris-root-dummies.html thread and
stop before you get to figure 38 (
do not proceed with the wipes).
Be sure to go ahead and make a Nandroid backup like the guide says. Stay here in the recovery menu, because, in the next (last) step, you are going to install/flash the
engtools3.zip file. Proceed to the "
Third" step, below.
-- or --
B. Follow surgeon0214 / alprazolam's
http://androidforums.com/htc-droid-eris/125436-detailed-leak-root-tutorial.html thread:
1) For Windows,
stop after doing step 10.
Do not do the wipes, etc.). Make sure you do the Nandroid backup. Proceed to the "
Third" step, below.
2) For Mac/Linux, you want to
stop in the middle of step 10 (i.e., you only want to do the Nandroid Backup;
do not do the wipes). Stay here in the recovery menu, because, in the next (last) step, you are going to install/flash the
engtools3.zip file. Proceed to the "
Third" step, below.
=========================
Third (and last), since you are still in the custom recovery menu, return to the main menu and select "
Flash zip from sdcard". Select the "
engtools3.zip" file that you downloaded and placed on your /sdcard earlier. After its done, return to the main menu and select "
Reboot system now".
=========================
That's it! When your phone finishes rebooting, you'll have the SuperUser app in your application drawer. You should also be able to verify that you have root by going to Android Terminal Emulator (free in the Market) and typing "su". You should be prompted by the Superuser app to allow or deny permission to the app (choose allow, obviously
) and it should respond with a "#" prompt. Type "exit" to quit out of the terminal emulator.
=========================
I know, there's nothing about overclocking, etc. here... If you want to overclock, you'll need to download the setCPU app from the Market (yes, its not free--apparently, some devs created ROMs w/setCPU included without asking for permission from the developer; so the recommended method of acquiring it is from the Market--so the dev will, rightly, be recompensed for his work).
Also, if you want to overclock higher than 710MHz, then you'll have to install Zanfur's overclock kernel (reference Nestor's post
http://androidforums.com/all-things-root-eris/121660-root-without-rom-yet.html#post1136379) from
Overclock Patch and update.zip - xda-developers).
Cheers!
edit: please, those who have done this before or are familiar with the above steps, please chime-in and let me know of any issues, additions, or corrections I should make.
I've also included the MD5 sums for the engtools3.zip file (my calculate from the download I did) so folks can double-check that the file was properly downloaded and copied.