tweaking UML diagrams

[Robert Staudinger <robsta stereolyzer net>]

Hello, 

i've been doing a few class diagrams in dia, which i then exported to
eps in order to include them in a latex document.
It would be really cool if there would be a possibility to reduce the
class-boxes', arrows' etc. border width because the diagram looks very
"bold" after latex pdf generation.
I've been looking into the saved .dia file, but line-width doesn't seem
to be an explicit property of the uml shapes.
Any possibility to get "finer" lines would really help me. Maybe there's
even a possibility to hack (postprocess :) the eps file? 

Thanks for any advice, 
Rob