Formatting Problem in mspformat

I'm trying to get Pandora's Battery on my brother's slim PSP and when I use mspformat to 'logically' format the memory stick, as it says in the readme, it gives me a Write error. Is there something I missed or is the copy of mspformat I have corrupted?

Here is an autoinstaller for the magic memory stick, so you don't need to mess around with mspformat

Thanks. I'll give this a try and see if it works

I did that autoinstaller and it didn't work. It kept telling me that the file is corrupted and cannot be run

So I got XP Mode for my version of Windows 7 and I got it to format in mspformat properly, but when it does the memory stick modification in the autoinstaller, it gives me an error that I have no idea what it could be because it closes the command prompt too fast