[scribus] importing pdf or eps files; 72 dpi?

[acs]

Hello,

I am new here and new to scribus.  I am trying to write up a tech 
document and I need to import some eps or pdf files.  How do I get 
scribus to import them at a higher resolution than 72x72 dpi?  I need 
resolution of 300x300 in order make the lines on the imported graphics 
look smooth.  I tried setting the Files>Preferences>External Tools 
Postsript Resolution to 300 dpi but that does not seem to help.  Am I 
missing something simple here?

I am running on linux and using 1.3.3.13 release which is the stable 
release for my distro.

Thanks,


Brian R