Tempo detect crashes on long files

Hi there,
I have a 90 minute concert of various songs. I’d like to adjust the tempo of a few songs because the drummer was rushing a few. I have never played with tempo for a concert before. After a bunch of reading, here’s what I understand I should do:

  • Set all track to musical mode off
  • Run Temp Detect on the whole concert
  • Set all tracks to musical mode on
  • Embed tempo into project
  • Fiddle with tempo track as desired to correct

I tried to run Temp Detect on the whole concert, but it crashes the system while processing. I can cut up the concert but then the pieces get all scattered when I move to musical mode.
… Is there an easier way to do this?
Thanks!
Randy