Random offset image sequence based on particle ID

[olivier jeannel]

Hi gang,

I know how to set image-texture based on particle ID (image01 set to 
particle ID 01, image02 set to particle ID 02,etc.)

I'd like to have one image sequence (a video), with time offseted based 
on Particle ID. Example :
Particle 01 gets sequence from 0 to 100, particle 02 gets sequence from 
50 to 150, etc.

How do I achieve that ? I'd really like to avoid having 100 various 
videos filling my hard drive...

Thanks !