Full Brick = Permanent Brick

If that is what you mean by full brick, your PSP is useless.

If that is not what you mean, then you can try downloading
Rain's UltraLite MMS Maker for 5.00 M33-4 v1.2
Here: http://dl.qj.net/Rain-s-UltraLite-MM...5437/catid/151

That MMS maker can be used on Windows 2000, XP, Vista, 7.
You can use a memory stick adapter/reader and it works without plugging in your PSP via USB.