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You don't need a serial port to flash the openwrt firmware. I didn't use one. However if you want to add a display and button, you need it.

Second, the wl520gu is available in holland for around 45 euro. So no a lot more than on ebay. 43 euro at redcoon. 45 euro at zercom (eindhoven), used to be 25 when I bought it.

gerben wrote:You don't need a serial port to flash the openwrt firmware. I didn't use one. However if you want to add a display and button, you need it.

Second, the wl520gu is available in holland for around 45 euro. So no a lot more than on ebay. 43 euro at redcoon. 45 euro at zercom (eindhoven), used to be 25 when I bought it.

hmm you're right,didn't look at zercom, they have almost everything out there.

about the serial port display, that's a option for later.

So this weekend i finally had some time to redo it with a brand new one,This one is equipped with dd-WRT firmware,Successfully re flashed it with the open WRT (kamikaze build).
But now i'm stuck with editing the files in hyperterminal. I can load the files and modify the value's,but the only thing that holds me is to save the edited files and get the command back (root@OpenWrt:~# ) to go to the next command.

Whats the correct procedure to do this ?

Not sure what you problem is. I presume it is that you have trouble editing the text within a command line environment .
The text-editor that is available in OpenWRT is VI. It takes some getting used to, but here is the short version

vi yourfile
move cursor to where you want to add/change text
press 'i'
type the text you need.
Once done press the escape key and then type ':wq' followed by a enter (w for Write; q for quite)

If I press w than I can edit the text but when I press w than I thought that it went back to the edit mode, and if I pressed wq than it says q is not implemented.
So I'm not quite shure if it writes to the memory.

You forget the ':' in front of the wq