Sort of like saying "my truck is too slow" without telling us what truck, with what engine, and the weight of the load... oh yeah, and not telling us you are doing the Pike's Peak hill climb
Joking aside... More information needed for someone to help... click these links and provided the requested information
720P60 is not a legal DVD format. Use only 480i30 for DVD, with the MPEG2-DVD preset and either PCM or AC3 sound.
For the rest, answer the questions John linked to.
Agree w/ John and Harm, and have something to add. Is your project 7 minutes or 7 hours long?
For a 7+ hour project that you want to look good, you should not try to compress it to get much more than 60 minutes / per 4.7GB "side" of typical DVD media. Yes, professionally manufacturered DVDs put 2 and sometimes 2+ hours on DVDs, but they are sometimes dual layer and/or dual density, and they spend lots of time doing the compression with expensive tools to do so.
You laptop could be very slow compared with a fast system. Possibly you could hook up with someone that has a high-powered system that runs the same Adobe version as you do that could do the render for you?
>in case the laptop goes into sleep mode
So... go into the BIOS or Windows Control Panel and TELL the laptop not to go to sleep!!! (one of the questions in the link I posted... are you Windows or Mac?)
Also, in general, a laptop is SLOW for video editing... unless it was specifically designed for such
Some ideas for a Laptop Video Editing PC from past discussions
For effective HD video editing, a laptop with the following
-at least the Intel sandy bridge 2720 or 2820 quad processor
-and nvidia graphics preferably the 460m, 485m is a bit much
-1280x900 display with OpenGL 2.0-compatible graphics card
-and 8 or 16 gig ram and Win7 64bit Pro
-and 2 internal 7200 HDDs minimum