PC to Media box via HDMI?

[fsbee]

I was hoping to connect my media center PC to my pioneer 43" plasma,the PC has a DVI connection and my plan was to get a cable DVi to HDMI, and connect it that way---1st does that sound resonable ? 2nd I normally select which imput im veiwing via the remote control, dont know how i will select the PC imput through the HDMI as I've just got imputs 1-3 scarts and 4 on front for VGA ,I'd be grateful for any advise,thankyou