I'm happy to say that adding 3 Linksys USB200M USB adapters to my 3 Hughes HDVR2 units went well, the new CD works like a champ, made it very easy. Next, did the superpatch thing, very very nice.

These Hughes had their original drives copied to 120GB Samsung SV-1204 drives back in Feb of '03, no other hacks. The upgrade to 6.2 recently from DIRECTV went fine as well. One of these units is in an RV, networked and hooked to satellite when in garage. Will be very very handy to use the now-working MRV feature before setting out for long roadtrips with the kids this summer, this is the ultimate video jukebox (browsing my music collection on laptop I'll have with me, using the familiar TiVo interface as well, woo hoo!)

Now for a 4th unit in my parents house, not so good news there. The original Maxtor 40GB is in there, and went to boot the "PTVnet-S2DT-62-RC1PTVnet Utility CD for select Series2 DirecTV DVR Systems" CD with the same configuration I used to upgrade the other units, that is:
400 MHZ Pentium II PC
IDE master for TiVo drive on first IDE interface (hda),
with jumpers set for "master"
IDE slave for CDROM on second IDE interface, jumper on "slave"

But while it initially scanned and found something on hda, it then quickly said it couldn't find any of the paths and seemingly then continued with asking me questions. When I answered, I kept noticing file or path not found sorts of errors, so I knew something was up. Then quickly peeked at /var/log/messages (no floppy or USB key around, so didn't capture), and spotted this error burried in there:

tivobootdisk kern.warn kernel: EXT2.fs warning: mounting
unchecked fs, running e2fsck is recommended

Went ahead and put the TiVo back together, it works fine (but no networking of course), hoping to hear words of advice from this forum.

I'm thinking of getting a 2 200GB from CompUSA drives for $90 today:
http://www.compusa.com/products/product_info.asp?product_code=298845&pfp=cat3&tabtype=pi#moreinfo

for more TiVo units in my family. I may just start with a fresh drive if the above TiVo won't take upgrades, using instacake to make it easy, especially since I'm Vonage @ my house, and my parent's house doesn't like HDVR2 modem. This would seem to be the safest approach, as this drive does seem to boot, but may be having problems. For instance, it had incredibly slow operations before 6.2 upgrade (40 seconds to bring up Now Playing, whereas 120GB in my house took 20 seconds, now both take 2 seconds).