Default Samsung Galaxy s2 sgh-t989 (tmobile) Soft bricked.

So I was helping my friend root his phone, and ran into a few unsuccessful trials. Tried to flash recoveries from 2-3 sources, it didnt work but atleast he was able to start his phone normally. Now it shows the screen which says firmware error, try recovery from Samsung Kies. Problem is Kies wont even detect the phone.
Will the instructions in this guide fix his issue?
http://forum.xda-developers.com/show....php?t=1414341
Yes I can still access the download mode. The part I can;t understand in this thread is : "Find a G2x USB and check if it puts in download mode while its off. If it doesn't" Once in the download mode screen, WHAT exactly indicate if it has been 'put in download mode' Is it the "Added" text in Odin?