I have two system apps that I froze with titanium backup and tried to install gingerbread to no avail. with the help of vz I ended up taking my phone back to factory. I then rooted again so I could get tb back to install all my apps. I now have two apps (soundback and kickback) that shows in my list of apps in tb but wont execute. In appbrain they show they need to update but each time the update fails with "Package file was not signed correctly ". Can I delete these two system apps with tb and reinstall from the market? I'm hoping these apps are what are keeping me from installing gb.