I installed Q2005 H&B direct from the CD and let it remove Q2000 H&B. Everything appeared to go smoothly with one exception; it reported it couldn't remove a number of files and simple typed "Remove manually". No warning. no cautionary note. nothing more. I took this to mean it wasn't that important since many users wouldn't know where to go next.
These files are all in "program files\quicken\inet\common" :
1) localweb
2) localweb\ibill
3) localweb\mms
4) pnf\savemore
5) pnf\college
6) pnf\expert2
7) pnf\afford
8) pnf\expert
9) pnf\retire
10) qwipa\stage
11) alerts\fn
12) alerts
13) stage
14) Qwipa
15) PNF
Also listed in the "program files" directory were:
16) INET\COMMON\PNF
17) INET\COMMON
18) INET
19) Snap
20) Program
In the WINDOWS directory were:
21) Intuit\shared
22) Intuit
I simply loaded my data file and proceeded, sharing the data file on my home network between two computers. That was four months ago. All seems well but I'd have a bit higher level of comfort if I could get some assuring comments from someone with more knowledge of the programming of this product.