GRASS / Ghostscript

[N R A]

Not a true GRASS one, but please bear with me. 

I've recently got the Aladdin version of Ghostscript (3.2 I think) and 
compiled it. I can now take the Postscript from GRASS and convert it to 
PCX, TIF, etc. which I can import into Corel (3) so I can add a few 
extras. 

Problem is that the resolution of the image is really low !

Question is - how can I increase the resolution of the image that 
Ghostscript produces ?

(also is there a more specific list I can use?)

Thanks,

Steve Culshaw
NRA North West
e-mail : nra at cix.compulink.co.uk (use this for general usage)
or         sculshaw at cix.compulink.co.uk (Private - only checked at best 
biweekly)