Do not touch with a barge pole, save your moeny, it's a waste of Colin Firth's abilities. Stephen Fry & Jack Dee have tiny cameo parts, not leads like the packaging would have you think. Dates back to 1999, not the 2007 on the outer sleeve.
If you are wondering why there is a Colin Firth film out on DVD that you've never heard of there is a reason. It stinks. Poor script, sub-sub-sub Woody Allen never-quite-meets Richard Curtis plot (so it's a right mess of styles), poor camera work, nasty soundtrack, awful techicals (shoddy titles, poor DVD package, the list goes on).
Some form of ego trip for the previously unheard-of Mike Binder as he stars & directs. If I ever see his name near a film again I'll steer well clear.
I'd give it no stars at all if the option was available. It wasted 90 mins of my life, and probably several weeks of Colin Firth's. I can only hope he was well paid for his pains.