Just treat the chase 1 minute round as a regular round as far as IPs go for the driver. He still gets his 2 or 3 or 4 or 5 (VR only) passes during that minute and can choose to do a number or stunts and such as shown in the chase combat section.
For my games we just slow it all down to that minute round, rather than the usual 3 second round and assume the others are spending much of that time holding on as the vehicles slew through traffic and can only find a few moments to do something else.
If you have someone hacking or similar that wouldn't be effected by that type of thing, then sort out what they do first and then go to the chase combat. Chase is kind of screwy that way.
By the way there is a good chase generator
here. It's on the left, second item down.