I'm used to using Premiere 6.5 and switched to PE 3. Can someone help me with a couple of things?

In 6.5 I could hit enter and it would play the rendered video (eg. if I hit enter before a transition I could see the transition in action). In PE 3 when I hit enter it wants to render the video which looks like it could take a very very long time.

In 6.5 when I dragged an audio file and a video file down to the timeline at the same time it put them over one another and I could link the two clips easily with the link tool. What happened in PE 3? If I drag both clips down it puts them sequentially in the timeline and it's a struggle to link them.