[Proj] new 7 parameters

[massimodisasha]

hi,
i've 45 point of the (igm95) national italian grid of double points  
in (wgs84 - gauss boaga R40)
(IGM is the italian's geographical military institute)

all my points are distribuited in a small italian region.

i've done a little algoritms in matlab language  for resolve the  
Helmert linear sistem....
...now i've a new set of 7 parameters for do a trasformation beetween  
WGS and GB-R40.

how can i use this new parameters in Grass ?
can i use it in the (r.proj/v.proj) grass command?

how can i add in the proj library this new 7 parameters ? is it  
possible?
i've look at proj documentation, but  in the cs2cs doc (section  
towgs) i've found the instruction for translate a single  
point.   .....    my targhet is a coordinate translation that works  
with a raster file (image)

thanks!
Massimo