[GRASS-user] site's module

Hello,

I’ve installed Grass version 6.1 using cygwin as it it in this web http://geni.ath.cx/grass.html#toc3. I’m trying to use the commands included in the sites’ module, for example, s.in.ascii or s.out.ascii but it seems that this commands are not contained. Or I don’t understand what happen that I can’t used them. Could anybody tell me why? is there any way to obtain the same result with other commands?

Thank you for your help