Hi Okos
The kernel should work if you don't enable SMT aka hyperthreading (which you don't get an option for unless you enable symmetric multi processing) but you will only be using part of your processor which will slow down you machine considerably, if you check
(apologies for earlier typo)
Then you should be able to see if your p4 is hyperthreading or not depending on if two processors are listed - I also think the flags section of cpuinfo has something like ht, I would be suprised if the SMT is the cause of your network woes - possibly something else in the old kernel thats not in the new one? Anyway upto you if you try it or not, I spend several months on my first custom kernel before I realised I could activate hyperthreading but was glad when I did.

I seem to have solved the problem. Or, I have not had the problem since I did the following:

1. Compiled and Installed the Slackware generic kernel.
2. I setup rc.inet1.conf as follows

Code:

# Config information for eth0:
IFNAME[0]="eth0"
IPADDR[0]=""
NETMASK[0]=""
USE_DHCP[0]="yes"
DHCP_HOSTNAME[0]="bt"

# Config information for ath0:
IFNAME[1]="ath0"
IPADDR[1]=""
NETMASK[1]=""
USE_DHCP[1]=""
DHCP_HOSTNAME[1]="netgear"

3. Edited rc.wireless as follows

00:14:6c:09:0b:33)
INFO="Netgear WG511T"
ESSID="Any ESSID"
# KEY="000000"
;;

4 Blacklisted the following:

/etc/modprob.d/blacklist
blacklist bcm4309
blacklist b43
blacklist ssb