[R] run setwd at the launch of R

[bunny , lautloscrew.com]

Dear all,

my R files (and the .csv files as well) are saved somewhere pretty  
deep down my hard disk.
i have to chage to working directory therefore everytime i run R (i  
run it on powerPC mac), which is disgusting.
using the setwd command at the beginning of an R script doesnt really  
help because i have to find this file first by hand.

I am looking for possibility to run setwd during the launch process  
of R are straight after it ... any suggestions ?

i would be very glad about good ideas or help !

thanks in advance

matthias