hi

my environment uses:
zencart_v1.3.7
GC_v1.4.1Beta1.2
and mods
stock_by_attr_v4.4 and ot_local_tax_v1.0

I have everything working (thanks to a lot of great posts) and there are 2 problems I am trying to solve:

1) how can I configure Google Checkout to calculate tax based on
a)Santa Clara county/zip codes at 8.25%
b) rest of California state at 7.25%
c) all other states at 0% ???
NOTE: my shop's checkout works great with the mod; I have configured zencart with the State Zone at 7.25% and the mod to include all the zip codes for the SC county .

2) How can I disable/gray-out the Google Checkout button when the selected quantity > stock ? I currently use only one attribute (size)
and the "admin/configuration/stock/allow checkout=false" works for the
zen cart checkout but not for Google.

I spent many hours searching for answers before posting. Thank you!