p.map or ps.map

I am looking for a way to print a raster with a vector overlay in multiples
of A4 sheets and paste them togather to make a big poster.

Is there a way to use either p.map or ps.map to print this.

Also, how to print each panel output from p.map and ppm as driver.

Thanks.

Srinivasan
srin@brcsun0.tamu.edu