I have an idea for a revision to a product(start with something and
add to it).  How do I go about getting my product patented?  How do
work with the parent company of the original product without revealing
my idea to them?  I need details from scratch to marketing with steps
and links as necessary.  Thanks for your help!

What you are asking for may be too much to be covered in a response
here. You should go to nolo.com and check out
http://www.nolo.com/resource.cfm/catID/00E99E7C-76B3-406F-AE703233C2157E4E/310/101/

Once you are done browsing that page and links go to 
http://www.nolo.com/product.cfm/ObjectID/139AEDE9-69A0-4810-A7A87D2AD5422664/update/1/310/#summary
and buy 'Patent it yourself' you can get it on hardback for 43 bucks
or in electronic format for 38, it answers all of your questions and
much much more.

Good luck!
Elí

ps. if you live in the northern VA area I know that the Fairfax
library has an electronic version of it, you can check it out for 4
hours at a time at
http://fcplcat.co.fairfax.va.us/uhtbin/cgisirsi/DsL5K6Tay8/CENTREVLLE/74070038/9
your local library should have it as well, although not necesarily in
electronic format.