Change Workgroup

Hi,
My HP D7260 printer's Memory_Card has a Workgroup of MSHOME in properties network tab.
This is a group name that was used in XP. The Workgroup for Vista should be WORKGROUP.
I can not change this name even with an administrator account.
It is preventing me from mapping the Memory_Card. to a drive letter.
How do I get it changed?
Thanks

I changed my local network from Public to Private and then this "Map Network Drive" worked!

map to letter "J"
\\HP3B9FF7\Memory_card

HP3B9FF7 is the hostname from the Printer Network Configuration page

I CAN now access the pictures using the reader built into the D7260 printer.
The mis-matched group name was apparently not the problem though, it would be good to be able to change it from MSHOME to WORKGROUP
Frank C