Need help with Google Shopping Integration

[VBE-1]

I have been using the easypopulate froogle data feed but it is missing a ton of categories.

A) How do I add new product fields into the easypopulate sheet? UPC, Manufacturer Number etc..
B) Is there a good google shopping module that will make integration easy and save me hours manually adding and changing things?

Thanks

[Limitless]

regarding #2, I love MagneticOne's Export Feeds.

I use over 10 of them. Commercial, but worth the price in time saved.

It is a lot of work setting it up, mostly matching categories to googles (nice dropdown/searching feature within the module) but once that is done, it is set and forget.