[plt-scheme] testing scrbl work-in-progress in local svn area

I'm working on converting a doc.txt to a doc/manual.scrbl, but I'm  
doing this in my svn workspace [1], not in /usr/local/plt, where PLT  
lives after I do a "make install".  If I run setup-plt, my PATH  
conjures /usr/local/plt/bin/setup-plt, which does all its work in /usr/ 
local/plt, which is not where my work is.  How do I run setup-plt in  
my svn area so I can test my scribbling?

Geoffrey

[1] ~/test/plt/plt/collects/parser-tools