Hi,
I'm searching for a good optical stabilizer in vegas, i have a camera car that need some little corrections.
Any idea?

You have three main options and they're all fully discussed here and can be found with a quick search:

1. NewBlue Stabilizer
2. Mercalli
3. VirtualDub DeShaker

Thank you :-)

If you can get past the minor technical issues of installation, for a free application, DeShaker has proven to be pretty good !

To my knowledge (please correct me if I'm wrong):

1. Works as a plugin direct in Vegas Pro in both 32-bit and 64-bit versions and Movie Studio.
2. Works as a plugin direct in Vegas Pro 32-bit
3. Is an External program that can be automated somewhat in Vegas Pro via a script