In going over my earlier notes I see I was off a bit on a couple times, this next list should fix that.
All the times in this list are based on time from Catcha Falling Star but you could reverse that and start from the Corner Bar where my list ends.
All you really need to do to make it non-Catcha-centric is just subtract the times between the points you're interested in i.e. it's 40 min. from Catcha to Mi Yard and 43 minutes from Catcha to Canoe so from Mi Yard it's a three minute walk to Canoe.
Does that make sense?

From Catcha (although I never timed it, Sea Star is between 5-10 minutes from Catcha)

Ahh Bea's 2 minutes
Banmark cambio 7
Archway Pizza 9.5
De Bar 13
Sips and Bites 14
Rock House 15 (main entrance)
Pressley's "
Push Cart 17
Three Dives 21
Xtabi 22
Samsara 27
April Fresh Laundry 28
No Limit Bar 30
Home sweet etc. 33
Jenny's Restaurant 36
Chicken Lav 39
Mi Yard 40
Canoe 43
Sun Island 44
Corner Bar 55

Even though I've made jokes about drinking alcoholic beverages to re-hydrate I just want to make sure you understand that when we walked on anything over a mile (Three Dives for example) we had a back pack with bottled "watas" in it.
Seriously, most of us don't live full time in the tropics, if you decide to try walking around Negril pack some water or stop off every so often and re-hydrate with the real stuff - water.
De-hydration cause cramps at best and at worst it can literally knock you down, don't ruin your vacay.