but from where i can download original 6.2 package?
No where; 6.2 was released in 2002; since then the company has changed hands multiple times and the lead developers have been left behind...
Besides, to upgrade you don't need 6.2, you need to preform incremental upgrades to get to the latest version (I'm talking at minimum 6.2-6.x-6.5-7.0; where 6.x is whatever version would be needed to bridge 6.2 to 6.5).