R doesn't run on g4 iBook with Panther

I have a 12" G4 iBook with the latest os (Panther) with the recent 
updates. When I start R by double clicking, it expands for a fraction of 
a second and then, nothing happens.

There is mention in the readme about using something called "i-install" 
to uninstall a mistakenly installed library, but I do not know how to do 
this.

Any help would be appreciated.

Thanks,

Martin Cohen
mjcohen at acm.org