To get Monticello Browser to realise that a Smalltalk category and a Smalltalk package are the same, they must have identical names.
must use that exact name in the Package browser.
Monticello Repositories on SqueakSource cannot have non-alpha characters in their name.
But - the Monticello +Repository details in the Browser are the SqueakSource package name and UserID . If you omit the password, it will be asked for later, and Monticello will add it to the Repository details automatically - in plain text - for future use.
When loaded, the new package will be at the bottom of the list of Packages, *nopt* in alphabetical order.
So - Call the +Package in Monticello by the same name as the Category name in the System Browser.
They will automatically be kept in step.