GeeS,
I took your advice and I'm using the 'DEFAULT_GREY_TEMPLATE1.0_hfs.tpl' you uploaded for me, thanx.

I disabled "Persistant Connections" and also "Compressed browsing" for good measure.
I enabled "Specific HTML for download managers" so that if you're using a download manager, it could use it's magic to get the file if it stops or aborts the download.
I tried downloading a multi-MB file but I'm still getting partial downloads, bummer!

I need to do some reading before I make any more changes I think. I'll bet there's already an answer out there somewhere or at least some good clues to get this thing working right.
Thanx again for all your input and your diligent efforts,
Dennis
P.S. I moved the files that were uploaded to the appropriate folders under downloads for others to get - or try to get...

After disabling "Persistant Connections" (Hint!?) in the HFS menu, upload of files within LAN (700MB iso!) completed succesfully for first time!
Download still fails after some bytes on LAN, but succesful on Localhost...
Interesting: Connection is killed immediately, contrary to XP ?!? Changing other menu options did not help so far .
DennisLockhart: Your template seems to be very buggy, i did the tests with the default.tpl.