I have a little experience with this stuff, and I have gotten out of a semi-brick before, but this situation annoys me.
Here's everything that happened. I upgraded to 3.40 OE-A and everything went through fine, but my stupid self installed custom icons that I'm sure only works on 3.03 OE-C. I flashed a few other things too, but they were fine. Anyway, now my PSP wont load the XMB. I can still enter recovery mode, so obviously I can still access flash0. Basically since it wont load the XMB even after I flashed all of the original stuff (I'm talking about the entire flash0 from another one of my 3.40 OE-C PSPs. Don't think I shoulda did that...), is it a full brick or is there hope for me yet? I'll take any suggestions to fix this.