Install second exchange 2010 server in existing domain

Dear all,

Firstly, thanks for taking your precious time to read this. I want to test on a new setup recently:

I have an exiting domain controller(Win2008 r2): aaa.local + exchange 2010 server(Win2008 r2): @aaa.com. Serving our company staff about 5 years so far. This exchange server has 2 NIC: one local ip is 192.168.1.1 and one public ip is 211.211.211.100

If I want to setup another exchange 2010 server(Win2008 r2) in the same domain. This will serve another group of staff and using @bbb.com.  This exchange server has 2 NIC: one local ip is 192.168.1.2 and one public ip is 211.211.211.200

1) is this possible?

will this mess up the @aaa.com?

2) Any document I can refer to if it is possible to do that?

Thanks in advance ;)

Thomas