MSI with current user path and registry keys

[sauerwein]

I'm a newbie with AdminStudio 9 and InstallShield 2009 Prefessional.

I captured an Installation using repackaging wizard as user sauer (local administrator).
In the resulting msi package the current username (e.g. sauer) is in

Files and Folders - Destination computer's folders - Folder sauer\mail
Registry - Destination computer's Registry view - HKCU String Username Value sauer.bib

Is there a comfortable way to replace the user "sauer" with the current logged in user or a variable (which can be seen in the cmd-window with set)?

Or easier: can I create an msi package which installs in the current users environment?