Allowing a range if IP addresses through an ASA using ASDM

Hello Experts,
I’m sure this is a lame rookie question, but I’m a total Cisco ASA rookie, so I’m going to ask it any ways.  We have a Cisco 5520 at work.  Some users are trying to test new software and things are not working.  I have contacted the vendor and they have said we need to open five different ranges of IP addresses.  I don’t know how to do this.  I’m using the Cisco ASDM because I can’t seem to find any of the access rules in the Cisco cli.
Here is what I think I need to do (again, this is from within the ASDM (sorry about that)):
1.      Create a new network object group that contains the IP ranges that the vendor said I need to allow through our firewall
2.      Go to the Advanced ¿ ACL Manager
3.      Create a new rule in the from_out section where the source is the group I created in step 1 and the destination is any.

Does this sound about right?

As always,
Nick