I use a custom MSI to deploy spark and a a set of preferences to each computer in my company. The problem is that MSI installers can not target the root of a currently active user’'s profile (ie: C:\Documents and Settings%username%). So my MSI is not able to create a folder Sparks to that path and then copy the spark.properties file to the new directory. Your application should be creating its preferences in the proper location which is C:\Documents and Settings%username%\Application Data.
In short I would like to request that this be changed in future releases please.