You can get more memory by deleting the unwanted themes, wallpapers, ringtones, etc. from your phone. For deleting these stuff, you will need to do seem/flex editing. For this purpose, mPT is not the tool. I am sure there are various threads here that should be discussing seem edition. If you don't find it here, then head over to howardforums.com and there are endless sticky/threads for seem editing.