need to setup diect push on exch 2003

Hi All

I have an exchange organisation with two 2k3 servers neither of which are frontend servers.  I need to get direct push mail setup so i need to either nominate or setup a frontend server as activesync will not work if SSL and mailbox reside on same server.  I know of a "fix" for this but I do not want to fudge it.  Server one and two sit inside a firewall and one has an SMTP connector for external mail and there are a number of users that use RPC over HTTPS to retrieve mail.  My options as I see them are as follows:

Setup a new server as a frontend server but then I will have to migrate SSL, SMTP, change firewall and DNS.
or
Migrate mailboxes off of server one and designate it as frontend server.

I don't want to setup another server but I am wooried that if I migrate mailboxes from server one to server two users who use RPC over HTTPS will not be able to retrieve mail and they are overseas so getting them to bring their machine into the office to setup outlook again is not an option.

Anyone have any suggestions for a seamless and easy setup :)

Mucho Thanks in advance