Well, we aren't reall on the same page, but that's OK. I think I have enough information to put this together. This might get lengthy, so stick with me.
When I refererred to the VPN server address, I did mean the address from the details of the VPN. You should be able to make a connection to that, but you can't. You have a routing problem.
I am assuming that you are allowing the routers on both sides of your VPN assign addresses to the computers that are connected to them, and that you have not changed the address range that each of them is using, so all of your addresses are similar to 192.168.1.xxx. I am also asuming that you are assigned addresses that are in the same range when you set up RAS. You haven't said (I didn't ask), so if any of that is not correct it might change the solution.
Let's have a short lesson on ip routing and the VPN.
When you create a VPN connection, a virtual network adapter is added to both the VPN client and the VPN server. These new adapters allow both machines to take an additional ip address. These are the addresses that you assigned in the RAS setup. The new addresses do not replace the existing addresses.
An ip address can be broken into two parts, the network address and the host address. In an address like 192.168.1.100, the 192.168.1 is the network portion and the 100 is the host. Any computer that has an address of 192.168.1.xxx is assumed to be connected to the 192.168.1 network and can be reached by sending data out to the local network. A computer with an address of 192.168.2.xxx is on a different network, so the data must be sent through another device to be routed to the remote network.
If there is more than one adapter in a computer, data is sent out on the first adapter that has an address that is on the same network as the destination. If both of your adapters have the same network address, all data is sent out on the first adapter. No data will make it's way to the second adapter. I am thinking this is your first problem to overcome.
If you try to send data to a computer that has a network address that is the same as the computer you are sending from, the data is sent out to the local network. If the computer you are trying to connect is on a different physical network, the data is dropped because there is no way to get it routed to the right place.
Now the solution:
You need to change your ip addressing shceme. Each of your networks needs a unique network address.
First, change the addresses assigned to your home network. The network address should be 192.168.3.0. I'm afraid I can't tell you exactly how to change it for either of your routers, but it should be similar to the process you used to open ports. You will need to change the address of the router to match the network address as well, it should be 192.168.3.1. On some routers, if you change the address of the router, it will adjust the network address pool it uses accordingly.
If you have assigned static addresses to anything attached to your network, you will have to change those as well. Once you have all of the addresses changed on that side, restart everything to load the new addresses and try the VPN again. It should work at this point. You should be able to ping the VPN server address (the one from the VPN details box).
If you want to connect to other machines on your remote network, you will need to change the addresses on the remote network or the addresses assigned to the VPN -- I would change both. Change only the third number, (192.168.xxx.0, change the xxx part). You can use any number between 1 and 126, but it can't be the same as the number on any other subnetwork. Routes would have to be added to direct the traffic through the VPN to the remote network. I would get the basic setup working first, then work on routes. Post back if you need to do this.
Hope this isn't too confusing, would have been much easier to do with pictures. If you don't understand, post back and I will try to clarify.