Bitrock is used to create the self extracting content packages used by DAZ.  The file produced should be a self contained executable.  It should have the extension .exe.  Just click on the exe file and it should self extract - asking you silly questions and then placing the content in the folder you specify.  Be sure to specify the folder above the runtime you want it placed in (the poser directory if you haven't created additional runtimes).

If it's not an exe file, there is a problem with the content.

To my knowledge, DAZ only distributes in this fashion.  Many have suggested they switch to zip files, but they don't seem to trust their user base to put the content in the right folders.

Klebnor

Lotus 123 ~ S-Render ~ OS/2 WARP ~ IBM 8088 / 4.77 Mhz ~ Hercules Ultima graphics, Hitachi 10 MB HDD, 64K RAM, 12 in diagonal CRT Monitor (16 colors / 60 Hz refresh rate), 240 Watt PS, Dual 1.44 MB Floppies, 2 button mouse input device.  Beige horizontal case.  I don't display my unit.