Lilypond and Vim

[Kale Good]

Hello,
Can someone point me towards a place to get some good help setting up a 
.vim file? I'm trying to edit the lilypond.vim to do a few things 
different and having no luck.

map <buffer> <F6> :!gv --watch "%<.ps" &<Return>
replaced with:
map <buffer> <F6> :!evince "%<.pdf" &<Return>

Neither of these work. I assume the "%<" points towards a tmp file that 
is being created, but I don't really know. Evince opens and says no such 
file. When it is set to the gv command, nothing happens (well, the 
command is printed at the bottom of Vim, but that's it.)

Thanks,
Kale