if you have a terminal emulator then you can uninstall the apps on the phone. otherwise, you'll need a computer with the sdk tools installed on it to do so.
open a command prompt window
navigate to \sdk\tools
type: adb shell
mount your file system with read/write by typing the following:
mount -o rw,remount /dev/block/mtdblock3 /system
go the app directory: cd /system/app
type in: ls
this will list all of the .apk and .odex files
the command to remove is: rm -r xxxxxxx.apk
be careful what you remove and remember to make a nand backup.
As for live wallpapers, they do not work with Sense just yet. So you have to turn off Sense and use the regular launcher on order for live wallpapers to work.