When using a floor jack to jack the front of a 99 Bonne, where is the best place to put the jack, and where is the best place to put the jack stands? Thanks!

Put your jack dead center on the front part of the subframe. Make sure it'* not on the plastic splashguard, or on the radiator support. Jackstands should go under the regular jack spots under the leading edge of the doors, but make sure you have the right type, you need some with notches in the top, or you'll crush the body seam underneath, and that can leave a place for rust to take hold in a bad way...

Wow, I've never thought about a rust problem there. Where can I get jacks for this?

So as not to hijack this thread, I'll add that I usually have a larger jack contact surface for the center with the middle of said surface a bit off-center (towards the back) on the crossmember.

Jack to the subframe is usually good as Gonneville suggests. I personally prefer putting the jack stand under the rear subframe bolts. There'* a nice notch in the frame where it will sit.

I jack from the front subframe. makes it easier to change slicks with the whole front up in the air