To be fair, that was 7% in the EU elections, where people are more likely to vote for single issue parties, where the voter participation is pretty low, and where it feels like it doesn't really matter if you vote left or right.
In the national elections, voter participation is much higher, and a lot of people who would vote for the PP in the EU elections might not do so, because they think it's more important to vote for the left or the right, myself included.
Then again, our current right-wing coalition passed a bunch of copyright maximalist bullshit laws, and even though I'd rather have them in power than the left wing, that betrayal stings, and I think a lot of people like me are similarly pissed about it come the next national elections in 2010.