Windows 7: wifi access from domain to domain

I have two domains, company.com and companytrain.com i need to be able to access the wifi that is on company.com from a laptop that is joined to companytrain.com any easy quick ideas? im running win 7 pro 32 bit with the following security on the company.com domain wifi

Security Type: WPA2-Enterprise
Encryption Type: AES
PEAP

the real deal is that i just need companytrain.com to share the wifi with company.com as under companytrain.com domain there are other attributes that need to be accessed

If you have credentials for the company.com, you should have no problem connecting to the WiFi and utilizing available resources. That would all depend on the permissions and setup of the wireless, however.

companytrain.com is located on a different DNS is there a setting or permission that i would be missing to allow non domain machines to access the wifi using an AD account from Company.com domain?

I just realized you mentioned WPA2-Enterprise, which requires authentication to another server such as RADIUS, etc. I am not sure how to set that up to allow another domain but hopefully another member of the board can be of more assistance.

Do you have access to both domains/how is the authentication piece set up for the company.com server?