New testing - 25 Juky
In another forum I got a reference to a web site "the How-To Geek" with a posting entitled: 'Share Files and Printers between Windows 7 and XP'.
I figured I'd follow it's instructions the best I could to see if, with modifications because of the external drive, I could get Win7 32-bit, on both system, and Win7 64-bit on #1 system to finally allow access to each other and/or the external drive.
Both systems at first booted into XP Pro; the printer, scanner, and external drive powered up to verify, again, things were accessible from both systems. Verfied.
Booted #2 system into Win7 32-bit. Initial check showed no difference from above; #2 still could not access external or #1. The XP system could access external, #2 and #2 with Win7. Verified workgroup name I assigned was still in effect on #2 with Win7.
On #2 system followed the article and verified Advanced sharing settings were as described for Home and Public profile. Followed the instructions in the article but could not find the printer attached to the XP machine to share - the opposite of what the article was trying to accomplish. No success here.
Booted #1 into Win7 32-bit and same problems as mentioned earlier. This time I tried to share the printer between the two Win7 32-bit systems and sharing was activated on the printer attached to #1 system but it never showed in Network or shared on #2, as shown in the artice referenced above.
Booted #1 into Win7 64-bit. As above, external, #1 and #2 accessible. Turned on printer sharing for printer attached to #1 and went to #2 to check. Printer showed, driver download started. Took awhile but printer finally showed up on #2 as a available from #1 - so that worked. But still could not access the external drive though the Linksys NSLU2 was accessible from both systems.
Wracking my brain. Look at Control Panel > Programs and Features > Turn Windows features on or off > compared the list of Windows features and added those items in #2 system that were not installed as compared to #1 system. Rebooted. Made no difference; external still not accessible from #2.