Nand dump

I hope I'm not breaking a rule by posting another thread for the same problem, but I stopped getting responses and I have different, more specific questions..

In short, pandora's battery isn't working for me and I need a 1.5 nand dump to get it to work. My questions are: How do I get the nand once I have a working 1.5 psp in my possession and once I have the dump, how do I use it to unbrick my psp? Oh, and just to make sure, the way I would get a 1.5 psp would be to use pandora's battery on my friends psp. Is it safe to assume that my problem was solely involving my psp and the battery will work fine on his?

Thanks.