tunnelling through 2 servers

hi guys.  i'm unable to access my home server directly from my work station due to a firewall.  i do have access to a unix server, and from there i can ssh into my server from command line (ssh myhomeserver.com) but if its possible i'd like to use putty.  i want to be able to tunnel my workstation traffic to my home server, through the unix server, but haven't figured out how.  

i've tried opening a putty session to the unix server then opening a second putty session using the first as a proxy but it failed.  i've been able to use putty as a proxy for other applications but it hasn't worked for me on this.  when i launch the second putty session i get an error "server unexpectedly closed network connection"  i get the same error from another computer.  

any tutorials for how to daisy chain ssh connections?

kevin