Google's DNS servers are only for fetching records to a client, so they are not what you are looking for. You will not be able to add/remove records to suit your needs.
There are 2 possibilities of how you can proceed:
- See if your server host offers a DNS service and use theirs. This would require no DNS setup with ISPConfig. The downside to this being that all changes will most likely need a ticket sent in, in order to be processed.
2 Maintain your own DNS. This is not as simple as it sounds and requires some research on your part if you don't know about creating records. The upside being full (and in case of sub-domains, instant) access to new DNS records that you can deploy any time.
Option 2 is your best choice, and I will try and give you links to concise tutorials to help you on your way
Step 1: Create nameserver entries with your registrar, and bind them to the IP's you want your DNS servers to work off of. This takes 24 - 48 hours to propagate, so I suggest doing this as much in advance as possible. Then, when you get further along, your site is not left in internet purgatory. An example using GoDaddy is here:
Step 2: Create a DNS zone. Documentation on this can [be found here, and info on record types can [URL="http://help.slamdot.com/idx/0/057/What-are-the-types-of-DNS-records"]be found here](http://docs.ispconfig.org/creating-web-sites/). Make sure if you are transferring an existing domain, that you populate the zone with all sub-domains in addition to what the wizard does.
Step 3: After all of the above is set up, you can then point your domain(s) at your newly formed name server entries. Again, this will take time. Please be patient while your DNS records propagate throughout the world. Usually done in maybe 6 hours, but it can take up to 72 hours to circle the globe.
This is a bare bones tutorial, so let me know if there is anything else you need help with. Good luck!!