I made this today and I thought others might be interested too.
It's just a little spreadsheet that tells you when you will hit your target if you carry on losing the same rate you have done so far. You update it each time you weigh yourself and the end date changes accordingly.
It's dead easy to use if you're not sure about spreadsheets and there are instructions included.
http://cheapsheetmusic.co.uk/projector.xls
Enjoy!
