Thanks everyone... Slowly getting to grips with it...
To answer some questions -
(a) both machines can ping each other, on IP and also on machine name. Response comes back immediately (no detectable lag).
(b) no firewall software on the PCs anymore.
(c) As for the IPC$ share, my personal understanding (take it orleave it) is that it is a default Win2k share but is not really a "share" as such. By default there IS a share on each hard-drive (MS call it an "Admin share"). There is a reg hack to disable the default Admin Share - i disabled it soon after I installed Win2k. (I've previously been networked at my old house like this - all Win2k machines - no problems).
I've no idea what the IPC$ share is for, but if my understanding is correct then there is no actual password as such - it shouldn't actually be accessible by users. Maybe am wrong though. I think it's a step forward though, since at least it means that Win98 can see my PC... Got to be a bonus...
So then. Ping works fine on machine name and IP. Gaming works fine. I can do the ping thing if you like, NooNoo? Given this info, do you think it will help? Your call...
For the record I've now set both NICs to be 10baseT and half duplex. There is some more progress, and also a step back. Firstly, I cannot see the "gutted" from my girlfriend's PC anymore (grrrr) BUT!! If I go through Start>Run>"//gutted/shared" I now *SOMETIMES* get prompted for a password for the share. I get asked for a password for the actual share I created - which is great. There is no actuall password on the share, which is not so greate - and my girlfriend's password doesn't let me in. First time I got "password incorrect" second time I got "An extended error has occured". Few a few moments after that, I get error "The network name cannot be found". Then I try again and get a password prompt.
I tried my Administrator password, but it still says "Incorrect password". Not sure which other passwords to try, or even if the problem really *is* related to passwords.
Looks like this is something to do with the NICs or router not being able to handle full duplex at 100baseT.
Summary:
both NICs at 10baseT
Now I occasionally get a password prompt (although it doesn't accept good passwords), "network name cannot be found" or "extended error has occured" - I've not seen "network is busy" since changing NIC settings.
The joys of networking :D
Thanks again, though, for all the help so far. Very mcuh appreciated!
Dan.
I did create the share myself...
I created a new folder and called it "My Shared Folder". I'm a bit sad when it comes to conventions. I've got loads of folders in "My Documents" called "My Music", "My Resources", "My Downloads" etc etc.
But regards username, I've specified username as "<first name> <last name>" with a space in the middle. I'll try just "<first name>" with no spaces. I'll also try creating a new folder called simply "share" or something - no spaces.
Definitely getting close though. I can almost taste it :D
(Just got back from collecting my girlfriend from work - will try cross-over cable in a bit, too).
INterested in the full Win98 network reset
Matridom - next on the list is to uninstall/reinstall the TCP/IP stack. Shouldn't take all that long - I will have to contend with about a hundred Win98 reboots, but that is par for the course (until I can upgrade girlfriend to Win2k or XP...)
But in the meantime, I'd be interested in any info on a Win98 networking reinstall... If you can find the info, send me a link if poss. Or PM me for me email addy?
Thanks for all suggestsion so far. Even though it's truning into a pain in the ar$e, it's good to know that there are people around to help out ;)