1. Follow this guide to get SAR and srconfigs set up (Install these on base Portal 2, they'll automatically translate onto Divinity)

2. Add this set of text to cfg/srconfigs/mkcats.cfg

cond "game=portal2" sar_speedrun_cc_start "Divinity: Chapter 1"
cond "game=portal2" sar_speedrun_cc_rule  "Start" entity action=start map=sp_a1_divinity_intro targetname=wakeup_camera inputname=Disable
cond "game=portal2" sar_speedrun_cc_rule  "Finish" entity action=stop map=sp_a1_divinity_core01 targetname=InstanceAuto1-viewelevator inputname=Enable
cond "game=portal2" sar_speedrun_cc_finish

3. Download this file and place it in cfg/srconfigs/cats (Make sure it's named divinity.cfg)

4. Put the text "add_cat divinity" (no quotes) to cfg/extra.cfg

5. Open Divinity, run the command "divinity" (no quotes) in the developer console, and finally "do_reset" (no quotes) to start/reset runs.