Thank you Thomas & Jeff for your prompt replies.

I've emailed the author of NetSwitch to see if that does RWIN / MTU /
etc.

I've read through the help on NetSwitcher and MultiNetwork Manager, but
don't see anything there about tcp/ip stack settings. Hope to be able
to test them out later.

Jeff - GREAT idea about the simple reg files. That should do the trick,
easy, quick, and effective.

I cross-posted thread to 5 (not 8) groups, because I was unsure which
group was most appropriate. Searches returned the most results for
RWIN in the 5 I selected. For future reference, which single group
would you suggest posting questions like this to? I didn't think that
cross-posting would cause any problems, and am frankly still unaware of
what the problem with cross-posting is. Isn't most newsgroup software
smart enough to mark messages read in multiple threads?

Thanks again!
Ken