Is there any reason not to create a self-installing app?

[jonathandlynch at gmail.com]

For pc and maybe mac, it seems like it would be possible for the app to have two modes. On first open, it would take the user through an installation process where it handles saving the various files and sub folders, and adding the start menu stuff.

When opened after that, it would just run normally.

Are there advantages to doing it that way, rather than using an install-creator program?

Sent from my iPhone