I'm having serious trouble and not-understanding going on here.

This should be easy for you guys and I'd really appreciate some help here...

IS-State:
Macbook and Linux both have functioning WLAN connections, pings etc work
Macbook and Linux can connect via crossover cable, pings etc. work
However:
Knetwork-Manager does not allow me to activate both connections on linux at the same time. The reason for this is unknown, since it used to let me do this, without any success though, as both machines lost internet-connecting abilities, although wifi-connected, as soon as eth0-connected.

WANNABE-State
Linux connecting to wlan0 and to macbook via eth0 with static IP-addresses, giving Macbook internet-access at the same time.
Alternative, not favoured, but acceptable WANNABE-State: Linux connecting to Macbook via eth0, accessing internet via Macboks "internet connection sharing"
Also this unfavoured alternative does not work. The reason remains unknown, since it worked without any problems wih UBUNTU being configured as DHCP-Client.

This shouldn't be hard, right?

wlan gives out IPs 192.168. 2.x
eth assignes IPs : 192.168. 3.x
with x being 34 for linux, 35 for macbook

please help me...

1. making knetworkmanger connecting to two networks
2. writing he appropriate routing table in Yast.

Thx