You could try flashing clockwork mod the instructions for doing so are in one of the pinned threads on this board. Dunno if it will work though but its something I would try to do if I was faced with the same issue.
If that fails then grab a stock rom from here http://g300.thebronasium.com/huawei/
and put it on your memory card so the path is /dload/update.app. Boot phone holding volume up, volume down and power buttons.
Be warned though doing so will wipe everything on your phone.
Have no experience with Odin nor any idea where you would find a regular 2.3.6 bootloader aside from reflashing a stock rom. Maybe someone with more know how will pitch in to clarify this side of things.
Be aware it its usual for an update.app to fail if you try to flash an older rom than what was already installed so if one fails then certainly try another.
Edited by droiddruid, 22 August 2012 - 03:31 AM.