The detailed guidance from UKBA is available on their website:
http://www.ukba.homeoffice.gov.uk/eucit ... /applying/
The essential thing is you need to prove your
family relationship (marriage certificate) and that your wife is
exercising treaty rights (as an employee in your case). Indeed they need more or less the same documents as for your EEA FP. All documents you submit must be originals and they will be returned to you when the application has been finished (hopefully approved).
The EEA2 form is very long, but straightforward to complete. Sections 2, 5, 6 and 7 you can completely ignore in your situation.
The information for your wife can be found at:
http://www.ukba.homeoffice.gov.uk/eucit ... /applying/
On the EEA1 form there is still a section on the Worker Registration Scheme (section 7). You can completely ignore that, as this Scheme no longer exists (since 1 May 2011). On the EEA1 form you can ignore sections 2, 4, 5, 6 and 7.
Although the EEA1 form specifies a slightly different address for sending it, you can simply put both forms in one envelop and send everything to the address given on the EEA2 form.
For the sections about your wife's work (section 4 on the EEA2 form and section 3 on the EEA1 form) she may ask the Personnel Department (Human Resource Dept) of the factory where she works for help.