I'm having a similar problem with the Hyperion RocketLauncher 1.5.6.
I click the install sample data button and on both Safari and Camino I get a small Mac classic type clock icon, which doesn't become the regular pointer for as long as I wait.
When I give up on that after a long time and continue ahead, I end up with a blank install with no data loaded.
I'm installing on OpenBSD. Have set the directory to writable by the web server so it can write configuration.php.
Im also having an issue, I have it where my provider wants it, but yet it wont take me to the install joomla page and its been 3 days now.. Im getting very frustrated with this. I used filezilla to ftp the entire package over to the server unzipped and yet still Im having an issue.. the provider says the whole package isnt there.. anyone around to help ? thanks !