JP0013,
I am sure there are several people on here that have done this before, but maybe not with the VIP 801A. Have you downloaded the correct IP Tool for programming the 801A? The setup is pretty straight forward, but you still won't be able to put it in a page zone, although you will be able to call it and have it answer.
I think a lot of the guys that do this use a 5304 or other IP telephone to get their audio out through the speaker leads and it allows them to put it in a page zone. Just be careful when taking it apart a there is a ribbon cable that connects to the display to the circuit board and it is not very long. Have a jewelers flathead screw driver handy to release the clip holding it in.
Thanks,
TE