Good job.  Most of my vacuum timing is 50deg's.  Could you list the addresses of the tables you edited for cold start.   
  
Nissan's tuning is setup for the owner/driver going uphill, in 5th gear, in 120deg F weather, towing, for 10 miles, wot.  Ok maybe that's an exageration.  There's a lot to be had in the timing tables.