plug it into the wall and charge it for a while see if that helps. droids do not like to charge from a computer when the battery gets low. i dont know if you did that or not but try charging it from the wall and going from there

 

Don't touch it. Leave it on the charger for an hour or two. This is just how it works because Motorola, as always, makes crap. The battery charging circuit is one of the many things in this phone that is just wonky.

 

Its not a charging issue, its a kernal issue. been there before. as soon as you turn it on, it says connect charger? if you don't it shuts down? I believe one of those root instructions says after you load the "root" file and flash, it says to flash a new "proper" kernal. read through your steps again and see if you might have missed that, or keep it plugged in, download Rom Manager, then download and flash a new rom.

 

stock is available on rom manager. one of several on there. I think it actually under cyanogen though.

Nope, its listed under "Stock Images" lol. sorry

 

Mounting the SD Card is usually under the advanced options (in Clockwork's recovery) I had SP Recovery with my Eris and if I remember right there its under a similar name like mount options or something. Good Luck.

Maybe you got a bad d/l of a ROM? did you double check the md5?.............just saw your post. I've had it happen before, but mine gave me a bootloop. Glad you got it working.