Extension Manager Error

I have successfully installed Joomla 1.7 on my hosting server a/c. It's a windows platform using FastCGI and so can parse php. I also of course have mysql. The default installation is running fine, but when I try to install a bundle pack for rocket theme templates, Gantry Library etc I get the following error:
Error Details:

The FastCGI process exceeded configured activity timeout
Error Number: 258 (0x80070102).
Error Description: The wait operation timed out.
HTTP Error 500 - Server Error.
Internet Information Services (IIS)

I contacted support but they told me this is a Joomla specific problem and I need to check a Joomla forum. So any ideas?
You save my life man.

I have a 500 error just in the 'Extension Manager: Manage' and I was lost, but you said that 'Change the max_execution_time' Of course! My little notebook can not move that page in time.

Thank you very much.
That's a Smart Move! Economy Hosting for $1.99/mo.