> -www1.askme.com/*cid={:1..860}*

Warning: pc-regexp are NOT handled, only limited regexp!

Use simpler expressions such as:
-www1.askme.com/*cid=1*
-www1.askme.com/*cid=2*
+www1.askme.com/*cid=3*
-www1.askme.com/*cid=3*foo=*bar=*

> But for both, the 'File download information' shows other 
> categories are being downloaded as well.

Use strict filters, that is, start using -* to exclde 
everything, then accept file by file, such as (this is only 
an example):
-* +www1.askme.com/index* +www1.askme.com/*cid=* ..

> 2. Would the above Scan Rules work if we use 
> -www1.askme.com/*cid=1* ......... 
> -www1.askme.com/*cid=3600*  ?
Yes

> 3. How can we add different categories downloaded in 
> different PCs, located in different places ?> Please guide us successfully
as to how we can download as 
> many subcategories as possible, if not all, as we can add 
> PCs from Internet cafes.

This will be harder, because you can not "merge" multiple 
caches, unfortunately.. the problem is not obvious, and 
unfortunately I doubt there is a simple solution. You can 
download using multiple sessions, but you'll have to merge 
by hand all of them after that.