Hi,
If your changes don't modify the default behaviour (so nlaunch can be used as it is now) I'm interested in merging them in.
I also don't want to check in any modifications without moving the repository to Mercurial first.
Google code has support for User clones for hg repositories (
http://googlecode.blogspot.com/2009/10/mercurial-server-side-clone-support-for.html)... this makes a lot easier to accept contributions like yours.
Would you be willing to create your own user clone of nlaunch and apply your changes? This would allow me to review the changes before applying them to the main repo without dealing with patches.
Cheers,
Germán.