(Hopefully) simple question: Adding another tuner

[andrew1810]

First post here, hopefully its an easy one.

I am running Sage TV 2.2.8, but want to add a second Freeview (DVB) Tuner, but was wondering if it was possible with my current setup?

I have:
SageTV connected to Hauppauge WinTV USB PVR2 which is connected to my Freeview (I'm in the UK) STB. I then use USB-UIRT to change the channels. SageTV is setup with XMLTV radiotimes and all channels are via the RCA on the Hauppauge, no analogue connection.

Is it possible to add a second freeview tuner to the PC without it conflicting with the STB? Also, can SageTV change the channel on these automatically, or would I need to use the USB-UIRT for this as well? The channel list would be the same as the other tuner

If this is all possible, are there any restrictions on USB tuner, I've seen a few around the £30 mark, would they be ok?

Thanks

Andrew

Edit: I should probably add I'm using the ATI remote wonder which is RF, so hopefully that should make things a little easier