I'll try editing it when I play tomorrow, and let you know if it works as expected.
If you are taking requests for future versions, take a look at d-jarls FullTilt SNG Multitable helper - I love that I can just specify buyins (plural) and how many I want (set/continuously) and just let the script take care of the rest (finding new tables and buying me in).
I realize there is a difference in that Party lets you pick a specific seat, where FT has random seating... I seem to recall an old script for Party SNG's, that let you prioritize seats.
Just a few ideas.
Is SNG's at Party your primary game btw?