logmein is a free remote pc software...install it on your pc based dvr and also a remote computer then try try to log in from the remote computer. I set the colour resolution on lowest quality, but it works fine...you won't get amazing quality on this setting but it works.
Once you know it works, then go to itunes and buy LogMeIn Ignition for iPhone application...it's $29.99 US for the
app.
cheers