We probably need to write a script to get those installed. One thing that you can do is to run the SP1 installer in the virtual drive, like so:
PlayOnLinx -> Configure -> Select Office virtual drive -> Miscellaneous -> Run a .exe in this virtual drive
and select the install for the service pack. Ill say though, that Microsoft stuff like this is very picky in Wine, so it may require some extra leg-work to get it working.
We can actually figure out what it needs, if you are down to work with us. Try running playonlinux from the terminal, and then try to install the service pack as I said above, and if it fails, take the terminal output and post it here. That will give us a clue as to what is happening.
Again, Im betting against it not just working, but really, in theory, if Office installed on there, then the SP installer should be able to patch up the installation.
Also, do they make an Office 2010 SP1 installer? Like, with SP1 and all of that already installed? That might be something to try as well.
Try the above method, and let us know if it works.