First before you Restore your iPhone, Sync it with iTunes. That way iTunes keeps a copy of your information.
Restore as usual using iTunes.
Then, do what you need to do using ZiPhone.
After that, sync your iPhone with iTunes and all your information shall go back in.
Edit - Music, TV Shows and Movies do not sync in at first try, only information. After that you sync again what you want to sync regarding media and thats it.