RAM Upgrade

Hello,

I have done several searches for this question with no luck so I apologize
now if it is a repeat.

I am running Windows Vista x64 SP1. When I installed the OS my computer had
4GB RAM installed. I have just upgraded to 8GB and enabled the "memory
remap" feature in the system BIOS.

When I view system settings indeed the system reports 8.00 GB memory. My
questions are as follows;

1. I have read in a number of places on the web that even running vista x64
if RAM is upgraded from 4.00 GB or less to over 4.00 GB then the OS must be
re-installed. Is this a correct statement? I really do not want to have to
pave my system and re-install everything!

2. Will a 32bit application installed on vista x64 be able to take
advantage of this extra memory? I am running Adobe After Effects CS4 (a 32
bit app). When it starts it reports that it is using 4.00 GB RAM (only
reported 3.1 GB with 4GB RAM installed) but under memory preferences it shows
8GB available. Why is this?

Thanks very much in advance.

--
Bundy115