I'm not sure if the title in question needs HDD fix, but if it does then the way to get it working is to mount a full clean iso disc image using virtual drive (only works on softmod console iirc).
That way you eliminate the issues surrounding file names too long for the Xbox file system to handle
Of course it's possible the title in question doesn't need HDD fix and whatever dump you're trying to use is messed up
I suggest you avoid any "HDD ready" packs you see floating around, no way of knowing what has been done to the games.
Edit:
Just had a quick look and it seems Amped 2 needs HDD fix, can't see anything about the first game yet though.