I'm thinking about reselling on Rackshack.

heres what each account needs:
PHP Scripting Permissions
ASP Scripting Permissions
PERL Scripting Permissions
Server Side Includes
CGI
Sub-domain support
Front Page 2000 Extensions
Directory Security (passworded directories)
POP3/SMTP Email support
Web-based File Management
SQL/Database Support
Traffic Statistics

Now out of all that what will I need to install? Also how does the Rackshak control panel work too? Thanks

Most control panels automatically set up all those features, I think only Plesk allows ASP. All depends on what control panel you will be going with. Go to www.plesk.com and there shuold be a plesk demo, not sure where you can find a ensim demo though.