Penetration Testing: testing webapp - socks and http proxy question

[learn lids <learnlids () yahoo com>]

hello everybody, 

moderators : sorry about the cross-post, but i thoght this question is relevant to all these 3 lists. 

i am trying to test a web app which is accessible by only a socks proxy. so i want to redirect the http traffic through 
the socks proxy to access th webapp. the setup is: 
 
browser {OUT 127.0.0.1:8080} ---> burp proxy --> socks proxy to webapp 

i am not sure how to make burp talk to the socks proxy. i used proxychains but i am not able to make it work. 

any suggestions are much appreciated. any other alternate methods would be nice. 

thank you, 
learner