wi fi - Android 2.1, HTC Hero EU and WIFI configuration issues

After many search and try, it seem to be impossible to connect to a WIFI network with hidden SSID. But perhaps I did my research wrong...

So, is there any way to connect to a WIFI network with hidden SSID?

An other problem: when I set an IP for a WIFI network without DHCP, that IP applies to all other configured networks, and when I move to an other network, I must change manually IP configuration each time!

So, is there some kind of profile for each network like on the iPhone to bypass this problem?

it is important for me to do that with the official HTC ROM: I do not want to use a hacked rom.

Thank you in advance for your help ^

Some infos on the phone below:

HTC Hero EU

Firmware

2.1-update 1

Baseband-Version

63.18.55.06PU_6.35.15.11

Kernel-Version

2.6.29-063c4d24

htc-kernel@and18-2 #1

Buil-Nummer

3.32.405.1 CL191507 release-keys

Software-Nummer

3.32.405.1

Browser version

WebKit 3.1