Hello,
When you emit particles form an object (lets say a nurbs plane) if you turn on the "Need Parent UV" on the emitter
all the particles will have 2 extra attributes you can use parentU and parentV which are the UV cordinates of your surface
where the particle was emitted, that given :
1)emit particles from your plane
2)Turn on Need Parent UV
3) Goal your particles to the plane
4) On the Per Particle Attributes add this 4 attributes i) parentU
ii) parentV
iii) goalU
iii) goalV
5)in the Creation Expressions write this goalU=parentU;goalV=parentV;
Hope that helps