unpacked src.tar.gz in /usr

[Wijnand <FreeBSD@wiersma.be>]

Hi list,

I think I have a big problem. I unpacked the src.tar.gz (3.4 RELEASE) in 
the /usr directory instead of the /usr/src/directory. 

Since this pc is my gateway and there is no way I can reinstall this machine 
now I have to try to solve this while still booted. 

All programs in /usr are failing now, I can't even ssh in.

I want to try to overwrite everything with the original data in the 
installation tarballs, but I don't know how to get them on this system when 
things like ssh, ftp, lynx aren't working. 

Any suggestions?

regards,
Wijnand