[STATSGRASS] spatstat to grass

[Jarek Jasiewicz]

Hi
My new problem: how to simply convert obiect of class im (spatstat) to 
SpatialGridDataFrame (sp) to put it to grass.
I found im maptools packages as.ppp function to convert spatial sp obiects to 
spatstat (ppp) and now I'm looking for function to convert it back. 
It seems that I know how to do manualy (little works), but If there is 
something tool do to it autoimaticaly, I will be welcome

Jarek