here it worked fine.
here is what i did:
1. installed the wifi card with the ralink driver
2. swithed the card to AP mode
3. OK on the screen that appears (dont need to change anything)
4. go to my ds - wifi
5. i set an ip myself to the ds. since my wifi card is 192.168.10.1, i set the ds to 192.168.10.2.
6. at DNS configuration, you place the same ip from you wifi card (in this case, 192.168.0.1)
7. go to my dialup connection config (yes, i play FINE with dial up)
8. Sharing, allow sharing with: LAN CONNECTION 3 (choose what is the name of your wifi connection, here my ETH0 is Lan connection 1 and the wifi is 3, dont know why i dont have a number 2..) This is for Windows 2000, in XP you dont need to configure the name of the connection.
9. wait some seconds
10. go to ds, test connection, works
11. play