H1 Stamping after: F1 -> H1B-companyA -> H1B-companyB

[snowleopard1010]

Hi,

Let me explaing my situation first:
- I entered US as F1 student, got a degree, and joined CompanyA in May 2005 as an H1B employee.
- In Sept 2005, I changed my job and joined another CompanyB as an H1B employee.
- I would be going for H1 stamping in two weeks.

My Questions:
- What documents, related to CompanyA, should I carry ?
- I have I797, paystubs, and W2 from CompanyA.
- I do not have I129 from CompanyA. Will I need it?

Thanks for your response,
Sonali