I have a DSE card here. works fine with windows, great for NetStumbler (the software u want) its modified for an external antenna also. (RPSMA socket, will work with DSE antennas)
I am assuming that u r using windows here. and though many would hate to hear me say it. the RTL8180 chip that its based on is better than the Prism chips for windows.
Will sell the card for $69 (would be less, but its got an antenna conn)