Issue title: [Bug] Windows installer doesn't tell you where to put system roms [sf#343]
 Issue body: **Reported by manuelbi on 2009-05-25 19:22 UTC**
In contrast to the old NSIS based Windows installer, the new one doesn't tell you where to put the system roms, at the end. I find this a very important message that should be retained in the new installer.

Old installer did this:
Function .onInstSuccess
MessageBox MB\_OK "If you want to emulate real MSX systems and not only the free C-BIOS machines, put the system ROMs in the following directory: $\r$OUTDIR\share\systemroms"


 Comments: 
 Comment 0: **Commented by mfeingol on 2009-05-30 17:55 UTC**
Committed revision 9932.
 Comment 1: **Updated by mfeingol on 2009-05-30 17:55 UTC**
- **status**: open --> open-fixed
 Comment 2: **Updated by mfeingol on 2009-05-30 17:55 UTC**
- **status**: open-fixed --> pending-fixed
 Comment 3: **Commented by manuelbi on 2009-05-30 19:58 UTC**
Confirmed, closing. Thanks.
 Comment 4: **Updated by manuelbi on 2009-05-30 19:58 UTC**
- **status**: pending-fixed --> closed-fixed
{'source': 'GithubIssues', 'repo_name_with_owner': 'openMSX/openMSX', 'issue_id': 90572479, 'repo_stars': 340.0}