Not the 604, I'm afraid. I believe it's already been suggested earlier in the thread as something people would like.
The following is the list of sections for the relevant part of Chapter 6, Performance, from the 605 Flight Manual (which, other than formatting, is basically the same as the 604)
TAKE-OFF PERFORMANCE
Introduction 06−03−1
Maximum Allowable Take-Off Weight 06−03−1
Take-Off Weight Limited By Climb Requirements – Flaps 20° 06−03−2
Take-Off Weight Limited By Brake Energy – Flaps 20° 06−03−6
Take-Off Weight Limited by Maximum Tire Speed 06−03−8
Take-Off Distance 06−03−10
Take-Off Distance, Flaps 20° – Anti-Icing Off 06−03−10
Take-Off Distance, Flaps 20° – Anti-Icing On 06−03−13
Take-Off Speeds 06−03−16
Minimum V1 Limited By Control on the Ground – V1MCG 06−03−16
Take-Off Decision Speed, V1 – Flaps 20° – Anti-Icing Off 06−03−18
Take-Off Decision Speed, V1 – Flaps 20° – Anti-Icing On 06−03−20
Rotation Speed, VR, Flaps 20° – Anti-Icing Off 06−03−22
Rotation Speed, VR, Flaps 20° – Anti-Icing On 06−03−24
Take-Off Safety Speed, V2 – Flaps 20° 06−03−26
Maximum Allowable Brake Temperature For Take-Off 06−03−28
Adjustments for Extended Second Segment Climb 06−03−28
None of those are for increased V speeds for improved climb gradient. All of the charts and procedures for determining speeds have a single result for a given set of conditions; there's no option to vary, say, V2. There's also no "overspeed supplement" to the AFM, as some other Bombardier Aircraft have.