Yea if u can go into recovery mode then you can unbrick it. Just use the recovery file that I stated on here in this forum and put the data.drax file or wat ever it is called that you used for 3.03 OE-C and put it in the same folder as the recovery folder that I stated in this thread here:
http://psp3d.com/getting-started-hel...-problems.html. I forget wher but some in there I posted the recovery thing you can use to reflash the 3.03 OE-C if you have the data.dxar file. I can't provide a link to the file since it is illegal to do so. But either sometime tomorrow when I get on my other computer I can upload another recovery file similar to that one and you can downgrade it back 1.5 FW.

Either way it should work!

O wait nvm here you go here is the file for the 1.5 downgrade just follow the same instructions as I said on the other forum but instead of putting the data.dxar file in w/ it just use the folder i provided and put the 1.5 eboot in w/ it but rename it to "update".

It should downgrade it back to 1.5 for you.
