It sounds like you've allowed customizations to run after a hard reset, and therefore all 4 of Nav, TV, PM and Opera are installed to device memory, with no entries in "Remove Programs". Correct?
During the customization process, besides forcing the installs to device memory, Sprint also erases the uninstall entries, so that you can't uninstall them. Nice of Sprint, huh?
You'll need to do a hard reset, then not let customizations run (do a soft reset when you see the customizations 3-second warning; and you'll have to do this soft reset twice - wait for the second 3-second warning).
Then you can copy the cabs from \windows to \Internal Storage. Then Nav and TV will install wherever you want. However, they still won't show up as uninstallable unless you use slightly modified cabs with "Uninstallable" set to "True".
Also, there is a newer version of the TV cab floating around.
Let me know if you want to try some updated cabs (all uninstallable, newer TV, Opera modified to be installable to Internal Storage). But, you need to be willing to do a hard reset to use them.