Reordering entries in package manual PDF's

Hello,

I have create my own R package and written the documentation in Rd 
format for each of the functions plus the package itself.

However now the functions appear in a random order in the generated PDF 
and the package documentation is placed in between the functions, when I 
would like it to be first, naturally.

Is there an easy way to specify the order of the entries in the 
generated documentation?

Browsing through the R manual and mailing list archives did not find 
anything. Rd is all I need, so I would not like to start using any of 
the more advanced documentation tools.

Thanks for your help!

All the best,
Aleksi