Thanks everyone .. I will go with Andy's suggestion of using a separate 
schedule to target a specific folder for backup.
Although Gary's suggestion would also solve my problem ,it comes with a lot of 
administrative overheard since i would have to use many exclude.dir  options  
for each specific server and  also if  an user did add any new folder in future 
i would end up backing up the folder structure.

Paul,  we do a lot of  folder specific backups on many of the servers( 
file,oracle,application,EDMS servers).Many of these servers do have folder/sub 
folder branches  of over 10,000+ .So  if i can be very specific in what i 
backup i can reduce  TSM DB growth to a certain extent.

Also,we are not particular about backing up the OS,system drive on some servers 
as these servers have redundant server units and even if we lost a server 
somewhere , the App services wouldn't be affected and we can rebuild the server 
from scratch .Its been over 5 yrs and we have never faced the situation of a 
server rebuild due to OS file corruption or user accidentally deleting the 
file.Hence we  stick with the plan of skipping OS backup for certain non 
critical servers .

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