Wanting to share internet between two networks

Hello,

I am looking for a low cost solution as I expanded business. This is a

low income business and I want the cheapest way out please. Also, I

have only little knowledge of networks.

I have a wireless network running in one office that has an internet

connection (WEP Key'ed) and about 8 PC's. It is using a LINKSYS router,

something like a W54G... (192.168.1.0) These have been working great

all the time.

Now, I have setup another 4 PC's on the floor above me in another

suite. One of the PC's have a wireless card and it can read my wireless

network and get to internet. These PC's are really side by side and may

grow to more PC's. So, I have a wired router on this floor (8 port

switch on standby, not connected yet). This is on a different address,

like 192.168.2.0

PC's can see each other except the one with Wireless who can read other

PC's but other PC's cannot share files on this one PC with wireless.

Also, I tried Internet Connection Sharing and it is not working.

So 2 problems:

1 - Developers need to share the internet connection from the lower

floor.

2 - Need access to the PC with Wireless card. It says, do not have

permission. Tried disabling the firewall, etc but still no luck.

All PC's are running on XP Pro.

Please help and let me know what information u may need. I am very good

at following directions.