cyrus imap quota

[Holm Kapschitzki]

on my debian box running cyrus imap, most of the postboxes have a quota
of 100 MB configured. The info is stored in a textfile. On the first
line there is the currently quota and on the second line there is the
real hardquota, for example 100000 (100 MB)

Its possible to stop the cyrus mailserver und replace the second line
with another value without breaking something  for all the defined
postboxes?

Holm